Boros Keyrune

Destroy target creature with power X or less.

Create an X/X green Ooze creature token, where X is the greatest power among creatures you control.

Destroy target artifact or enchantment.

1, T: This artifact deals 1 damage to target opponent or planeswalker.

Creatures you control get +2/+2 until end of turn.

Exile target creature or enchantment.

This land enters tapped. T: Add W or B.

Equipped creature gets +1/+0 and can't be blocked by creatures with flying. Equip 3 (3: Attach to target creature you control. Equip only as a sorcery.)