Baros, The Eternal Gift

Whenever a creature enters the battlefield under your control, create X 1/1 colorless spirit creature tokens, where X is the creatures converted mana cost.
Whenever a Blue creature enters the battlefield, target player draws 2 cards.
Whenever a Red creature enters the battlefield, deal 2 Damage to target creature or player.
Whenever a White creature enters the battlefield, target player gains 2 Life.