At the beginning of combat on your turn, up to one target land you control becomes an X/X Elemental creature with trample and haste until end of turn, where X is Obuun's power. It's still a land.
Landfall — Whenever a land you control enters, put a +1/+1 counter on target creature.
Landfall
Format Legality
Standard Not_legal
Pioneer Not_legal
Modern Not_legal
Legacy Legal
Vintage Legal
Commander Legal
Pauper Not_legal
