Garan, King of Yeti's

Whenever a player casts a spell with converted mana cost 3 or greater, you may create an X/X giant, where X is the spells converted mana cost. If that spell was a creature, you gain X life.
{s}{s}{s}: Giants and yeti's you control gain indestructible until end of turn.
{s}{s}{s}{s}: Giants and yeti's you control gain trample until end of turn.