Dovin Baan

+2: Create three 1/1 colorless Thopter creature tokens with flying.
0: Draw a card, then discard a card. Put a number of loyalty counters on Dovin Baan equal to the discarded card's converted mana cost.
-17: Create a 1/2 white Sentry artifact creature token for each card in your hand, then put a +1/+1 counter on each artifact creature you control.