Zirda, the Dawnwaker [Ikoria: Lair of Behemoths] Divine how would I know it

how would I know it worked

Set: Amonkhet Tokens Type: Token Creature — Zombie Shapeshifter Cleric Rarity: Common You may have Vizier of Many Faces enter the battlefield as a copy of any creature on the battlefield

Special Summon 1 Level 4 or lower Warrior monster from your hand

If the result is Tails

Set: New Phyrexia Type: Legendary Creature — Phyrexian Praetor Rarity: Mythic Cost: {3}{R}{R} Creatures you control have haste

Zirda, the Dawnwaker [Ikoria: Lair of Behemoths] Divine how would I know itSet: Ikoria: Lair of Behemoths Type: Legendary Creature Elemental Fox Rarity: Rare Cost: {1}{R W}{R W} Companion Each permanent card in your starting deck has an activated ability. (If this card is your chosen companion, you may put it into your hand from outside the game for {3} any time you could cast a sorcery.) Abilities you activate that aren't mana abilities cost {2} less to activate. This effect can't reduce the mana in that cost to less than