Unhcegila, the Serpent

Deathtouch, hexproof, reach, trample
{8}{u/b}{r/g}: Monstrosity 3. (If this creature isn't monstrous, put three +1/+1 counters on it and it
becomes monstrous.)
When Unhcegila, the Serpent becomes
monstrous, you may cast spells from your hand without paying their mana costs.
When Unhcegila, the Serpent dies, return all
nonland permanents to their owner's hands.