Stalwart Speartail

Enrage — Whenever Stalwart Speartail is dealt damage, other Dinosaurs you control and Dinosaur cards in your hand and library perpetually get +1/+1.
Whenever Stalwart Speartail attacks, you may pay {3}. When you do, Stalwart Speartail deals 1 damage to each creature and each planeswalker.