Raksha, Tyrant of Meralus

When Raksha, Tyrant of Meralus enters the battlefield each opponent may draw a card, each opponent who draws a card this way loses 2 life and discards 2 cards.
Whenever a creature enters the battlefield under your control you may pay {u}{b}, if you do you may exchange control of two target creatures that share a creature type.
Whenever an opponent draws a card they discard a card.