Derson and Krailn

Flying, Trample
Derson and Krailn enters the battlefield with X
+1/+0 Counters on it.
When Derson and Krailn enters the Battlefield,
choose one:
•Search your library for up to three creatures
with {x} in their casting cost
•Double the amount of +1/+0 counters on
Derson and Krailn