Urgud, dragon king

+3: target dragon deals damage to target creature, opponent or planeswalker equal to its power. if its yours add a +1+1 counter if its not add a -1-1
-4: gain control of 3 target dragons they gain haste remove any -1-1 counters from those dragons gain life equal to the number of dragons you control
-12: all players search their decks and graveyards for dragons and put them all on the battlefield. gain control of all dragons on the battlefield.