Theodin, the Diminished

When Theodin, the Diminished enters the battlefield, create Grima Wormtongue, a
legendary 0/2 blue and black Human creature
token with "Whenever a creature you control
dies, you may draw a card. If you do, discard a
card".
When Grima Wormtongue leaves the battlefield, transform Theodin, the Diminished.