Murasa
Plane -- Zendikar
Whenever a nontoken creature enters, its controller may search their library for a basic land card, put it onto the battlefield tapped, then shuffle.
Whenever chaos ensues, target land becomes a 4/4 creature that's still a land.
Spike Tiller
{3}{G}{G}
Creature -- Spike
0/0
~this~ enters with three +1/+1 counters on it.
{2}, Remove a +1/+1 counter from ~this~: Put a +1/+1 counter on target creature.
{2}, Remove a +1/+1 counter from ~this~: Target land becomes a 2/2 creature that's still a land. Put a +1/+1 counter on it.
Verdant Touch
{1}{G}
Sorcery
Buyback {3} (You may pay an additional {3} as you cast ~this~. If you do, put ~this~ into your hand as it resolves.)
Target land becomes a 2/2 creature that's still a land. (This effect lasts indefinitely.)