Ghalta and Mavren (March of the Machine)

Legendary Creature Ñ Dinosaur Vampire - Trample
Whenever you attack, choose one Ñ
¥ Create a tapped and attacking X/X green Dinosaur creature token with trample, where X is the greatest power among other attacking creatures.
¥ Create X 1/1 white Vampire creature tokens with lifelink, where X is the number of other attacking creatures.