Urza, Lord Protector [The Brothers' War] Secret Lair Drop Series create a token that's a

create a token that's a copy of equipped creature

convert Blitzwing

Threshold — Squirrel creatures get +2/+2 as long as seven or more cards are in your graveyard

Destroy it at the beginning of the next end step if it didn't attack this turn

Set: The List Type: Sorcery Rarity: Rare Cost: {3}{B} You may exile a black card from your hand rather than pay this spell's mana cost

Urza, Lord Protector [The Brothers' War] Secret Lair Drop Series create a token that's aSet: The Brothers' War Type: Legendary Creature Human Artificer Rarity: Mythic Cost: {1}{W}{U} Artifact, instant, and sorcery spells you cast cost {1} less to cast. {7}: If you both own and control Urza, Lord Protector and an artifact named The Mightstone and Weakstone, exile them, then meld them into Urza, Planeswalker. Activate only as a sorcery.