Nonbasic lands are Mountains.

Whenever a creature is dealt damage, Repercussion deals that much damage to that creature's controller.

{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.

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.

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.

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.

If an effect would create one or more tokens under your control, it creates twice that many of those tokens instead.