Tyvar the Bellicose (Showcase Halo Foil) [March of the Machine: The Aftermath] SM72 It has "This creature's power

It has "This creature's power and toughness are each equal to the number of experience counters you have

it becomes night next turn

Set: Core Set 2019 Promos Type: Creature — Dinosaur Rarity: Rare Cost: {1}{G}{G} Whenever an opponent activates an ability of a creature or land that isn't a mana ability

When Child of Alara dies

The Arbiter is a conduit of justice

Tyvar the Bellicose (Showcase Halo Foil) [March of the Machine: The Aftermath] SM72 It has "This creature's powerSet: March of the Machine: The Aftermath Type: Legendary Creature Elf Warrior Rarity: Mythic Cost: {2}{B}{G} Whenever one or more Elves you control attack, they gain deathtouch until end of turn. Each creature you control has "Whenever a mana ability of this creature resolves, put a number of +1 +1 counters on it equal to the amount of mana this creature produced. This ability triggers only once each turn.