Stitch in Time

Flip a coin. If you win the flip, take an extra turn after this one.

Forest

Berserk

Cast this spell only before the combat damage step.
Target creature gains trample and gets +X/+0 until end of turn, where X is its power. At the beginning of the next end step, destroy that creature if it attacked this turn.

Mountain

Awe Strike

The next time target creature would deal damage this turn, prevent that damage. You gain life equal to the damage prevented this way.

Unsummon

Return target creature to its owner's hand.

Plains

Prevent all combat damage that would be dealt this turn.

Giant Growth

Target creature gets +3/+3 until end of turn.

Soul's Fire

Target creature you control deals damage equal to its power to any target.

Claim the Firstborn

Gain control of target creature with mana value 3 or less until end of turn. Untap that creature. It gains haste until end of turn.

Swamp

Evolving Wilds

{T}, Sacrifice Evolving Wilds: Search your library for a basic land card, put it onto the battlefield tapped, then shuffle.