Shared Animosity
Whenever a creature you control attacks, it gets +1/+0 until end of turn for each other attacking creature that shares a creature type with it.
"The feud between dwarves and redcaps had raged for so long that no one could quite recall how it started. Few would believe it was sparked by a long-ago dispute over a spoon."
—*Assault on Delverhaugh*
Sneak Attack
{R}: You may put a creature card from your hand onto the battlefield. That creature gains haste. Sacrifice the creature at the beginning of the next end step.
"Korlag carefully prepared to try the new 'am bush' strategy he'd heard about."
—*The Ogre's Revenge*
Defense of the Heart
At the beginning of your upkeep, if an opponent controls three or more creatures, sacrifice Defense of the Heart, search your library for up to two creature cards, put those cards onto the battlefield, then shuffle.
"And as the rose began to bloom, the curse of Redtooth Keep began, at last, to wither."
—*Curse of the Werefox*
Doubling Season
If an effect would create one or more tokens under your control, it creates twice that many of those tokens instead.
If an effect would put one or more counters on a permanent you control, it puts twice that many of those counters on that permanent instead.
Garruk's Uprising
When Garruk's Uprising enters the battlefield, if you control a creature with power 4 or greater, draw a card.
Creatures you control have trample. (They can deal excess combat damage to the player or planeswalker they're attacking.)
Whenever a creature with power 4 or greater enters the battlefield under your control, draw a card.
Ground Seal
When Ground Seal enters the battlefield, draw a card.
Cards in graveyards can't be the targets of spells or abilities.
"They laid her to rest in the wilds, in a sacred place beyond the reach of nightmares or machines."
—*The Nameless Knight of Summer*
Hardened Scales
If one or more +1/+1 counters would be put on a creature you control, that many plus one +1/+1 counters are put on it instead.
"Before me writhed the guardian of my prize,
A serpent with stone skin and cunning eyes!"
—*A Traveler's Trials*
Leyline of Abundance
If Leyline of Abundance is in your opening hand, you may begin the game with it on the battlefield.
Whenever you tap a creature for mana, add an additional {G}.
{6}{G}{G}: Put a +1/+1 counter on each creature you control.
Nature's Will
Whenever one or more creatures you control deal combat damage to a player, tap all lands that player controls and untap all lands you control.
"The troll took the fauns' hesitation as fear and roared in triumph. In truth, they'd seen the ledge begin to crack beneath his weight."
—*The Goose Mother and Other Tales*
Parallel Lives
If an effect would create one or more tokens under your control, it creates twice that many of those tokens instead.
"Brave Syr Armont mused: Was the elves' true nature that of day's civility or night's savagery? Could such bestial rage be bestowed by curse alone?"
—*Curse of the Werefox*
Primal Vigor
If one or more tokens would be created, twice that many of those tokens are created instead.
If one or more +1/+1 counters would be put on a creature, twice that many +1/+1 counters are put on that creature instead.
Prismatic Omen
Lands you control are every basic land type in addition to their other types.
"There would be time later to mourn the lost, to weep for their fallen homes and lost treasures. But for now, they breathed in the untainted air and allowed themselves to hope again."
—*Last Stand of the Realm*
Season of Growth
Whenever a creature enters the battlefield under your control, scry 1. (Look at the top card of your library. You may put that card on the bottom of your library.)
Whenever you cast a spell that targets a creature you control, draw a card.
Unnatural Growth
At the beginning of each combat, double the power and toughness of each creature you control until end of turn.
"Should you hear witchstalkers howl,
Best to hide or run away.
They hunt witches vile and foul.
Fear both predator and prey."
—*To Walk the Wilds*
Utopia Sprawl
Enchant Forest
As Utopia Sprawl enters the battlefield, choose a color.
Whenever enchanted Forest is tapped for mana, its controller adds an additional one mana of the chosen color.
Greater Auramancy
Other enchantments you control have shroud. (A permanent with shroud can't be the target of spells or abilities.)
Enchanted creatures you control have shroud.
Karmic Justice
Whenever a spell or ability an opponent controls destroys a noncreature permanent you control, you may destroy target permanent that opponent controls.
Land Tax
At the beginning of your upkeep, if an opponent controls more lands than you, you may search your library for up to three basic land cards, reveal them, put them into your hand, then shuffle.
Smothering Tithe
Whenever an opponent draws a card, that player may pay {2}. If the player doesn't, you create a Treasure token. (It's an artifact with "{T}, Sacrifice this artifact: Add one mana of any color.")
As Foretold
At the beginning of your upkeep, put a time counter on As Foretold.
Once each turn, you may pay {0} rather than pay the mana cost for a spell you cast with mana value X or less, where X is the number of time counters on As Foretold.
Kindred Discovery
As Kindred Discovery enters the battlefield, choose a creature type.
Whenever a creature you control of the chosen type enters the battlefield or attacks, draw a card.
Omniscience
You may cast spells from your hand without paying their mana costs.
Rhystic Study
Whenever an opponent casts a spell, you may draw a card unless that player pays {1}.
Bitterblossom
At the beginning of your upkeep, you lose 1 life and create a 1/1 black Faerie Rogue creature token with flying.
Grave Pact
Whenever a creature you control dies, each other player sacrifices a creature.
Necropotence
Skip your draw step.
Whenever you discard a card, exile that card from your graveyard.
Pay 1 life: Exile the top card of your library face down. Put that card into your hand at the beginning of your next end step.
Polluted Bonds
Whenever a land enters the battlefield under an opponent's control, that player loses 2 life and you gain 2 life.
Aggravated Assault
{3}{R}{R}: Untap all creatures you control. After this main phase, there is an additional combat phase followed by an additional main phase. Activate only as a sorcery.
Blood Moon
Nonbasic lands are Mountains.
Repercussion
Whenever a creature is dealt damage, Repercussion deals that much damage to that creature's controller.
Sneak Attack
{R}: You may put a creature card from your hand onto the battlefield. That creature gains haste. Sacrifice the creature at the beginning of the next end step.
Defense of the Heart
At the beginning of your upkeep, if an opponent controls three or more creatures, sacrifice Defense of the Heart, search your library for up to two creature cards, put those cards onto the battlefield, then shuffle.
Doubling Season
If an effect would create one or more tokens under your control, it creates twice that many of those tokens instead.
If an effect would put one or more counters on a permanent you control, it puts twice that many of those counters on that permanent instead.
Nature's Will
Whenever one or more creatures you control deal combat damage to a player, tap all lands that player controls and untap all lands you control.
Parallel Lives
If an effect would create one or more tokens under your control, it creates twice that many of those tokens instead.
Greater Auramancy
Other enchantments you control have shroud. (A permanent with shroud can't be the target of spells or abilities.)
Enchanted creatures you control have shroud.
Karmic Justice
Whenever a spell or ability an opponent controls destroys a noncreature permanent you control, you may destroy target permanent that opponent controls.
Land Tax
At the beginning of your upkeep, if an opponent controls more lands than you, you may search your library for up to three basic land cards, reveal them, put them into your hand, then shuffle.
Smothering Tithe
Whenever an opponent draws a card, that player may pay {2}. If the player doesn't, you create a Treasure token. (It's an artifact with "{T}, Sacrifice this artifact: Add one mana of any color.")
As Foretold
At the beginning of your upkeep, put a time counter on As Foretold.
Once each turn, you may pay {0} rather than pay the mana cost for a spell you cast with mana value X or less, where X is the number of time counters on As Foretold.
Kindred Discovery
As Kindred Discovery enters the battlefield, choose a creature type.
Whenever a creature you control of the chosen type enters the battlefield or attacks, draw a card.
Omniscience
You may cast spells from your hand without paying their mana costs.
Rhystic Study
Whenever an opponent casts a spell, you may draw a card unless that player pays {1}.
Bitterblossom
At the beginning of your upkeep, you lose 1 life and create a 1/1 black Faerie Rogue creature token with flying.
Grave Pact
Whenever a creature you control dies, each other player sacrifices a creature.
Necropotence
Skip your draw step.
Whenever you discard a card, exile that card from your graveyard.
Pay 1 life: Exile the top card of your library face down. Put that card into your hand at the beginning of your next end step.
Polluted Bonds
Whenever a land enters the battlefield under an opponent's control, that player loses 2 life and you gain 2 life.
Aggravated Assault
{3}{R}{R}: Untap all creatures you control. After this main phase, there is an additional combat phase followed by an additional main phase. Activate only as a sorcery.