When The Sword in Stone enters the battlefield, create a 2/2 white Knight creature token with vigilance.

At the beginning of your upkeep, if you control a Knight, roll a d20. If you roll between 15 and 20, transform Sword in the Stone. Add 1 to your roll for each Knight you control.

Equipped creature gets +4/+0 and has first strike and protection from legendary.

Equip {6}

{0}: Attach Aeryan, Dragonforged to target Knight you control. Activate only as a sorcery.