Dinosaur Ally: Charge.
When Serasaur Bull attacks, kill an enemy attachment.
Card sounds may differ from in-game as they get updated.
Charge - Can attack the turn it is played.
Ally - Happens as soon as you have a unit of the named type. This can be when you play the unit with Ally or later if there's none of the needed type in play. Ally resets if the unit dies or is returned to hand.