Aierto, the Subjugator

Lifelink, Vigilance, Hexproof
Whenever Aierto enters the battlefield, whenever a creature attacks you, and at the beginning of your upkeep, create a 0/1 green plant creature token.
{g}, Tap 3 plants: Target creature gains Hexproof and Indestructible until end of turn.
{2}{w}, Sacrifice 3 plants: Tap all creatures target opponent controls.
{2}{w}{g}: Create three 0/1 green plant creature tokens.