Woodcaller Automaton (extended Art)

Prototype (You may cast this spell with different mana cost, color, and size. It keeps its abilities and types.) 2GG | 3/3

When Woodcaller Automaton enters the battlefield, if you cast it, untap target land you control. It becomes a Treefolk creature with haste and base power and toughness equal to Woodcaller Automaton's power and toughness. It's still a land.