Curse Rotted Greatwood

Defender, Hexproof
Whenever Curse Rotted Greatwood enters the battlefield
or leaves you gain life equal to the amount of creatures
you control
Pay {b}{r}, {t}: target creature gets +0/+X where X
is equal to Curse Rotted Greatwood's toughness.
If you pay with non-basic lands Curse Rotted Greatwood
loses hexproof until your next upkeep.