Animate Land

Until end of turn, target land becomes a 3/3 creature that's still a land.

Verdant Touch

Buyback {3} (You may pay an additional {3} as you cast this spell. If you do, put this card into your hand as it resolves.)
Target land becomes a 2/2 creature that's still a land. (This effect lasts indefinitely.)

Jinx

Target land becomes the basic land type of your choice until end of turn.
Draw a card at the beginning of the next turn's upkeep.

Vivify

Target land becomes a 3/3 creature until end of turn. It's still a land.
Draw a card.

Spike Tiller

Spike Tiller enters with three +1/+1 counters on it.
{2}, Remove a +1/+1 counter from Spike Tiller: Put a +1/+1 counter on target creature.
{2}, Remove a +1/+1 counter from Spike Tiller: Target land becomes a 2/2 creature that's still a land. Put a +1/+1 counter on it.

Dream Thrush

Flying
{T}: Target land becomes the basic land type of your choice until end of turn.

Hydroform

Target land becomes a 3/3 Elemental creature with flying until end of turn. It's still a land.