Concordant Crossroads [Secret Lair Drop Series] Phyrexian Beast sacrifice an artifact or creature

sacrifice an artifact or creature

but I believe a more mundane power source might suffice

Set: Innistrad: Midnight Hunt Commander Type: Legendary Creature — Zombie Warrior Rarity: Mythic Cost: {2}{U}{B} Whenever another Zombie you control dies

Set: FINAL FANTASY Commander Type: Legendary Creature — Human Wizard Knight Rarity: Mythic Cost: {1}{R}{W}{B} When Celes enters

a legendary 6/6 red Dragon creature token with flying

Concordant Crossroads [Secret Lair Drop Series] Phyrexian Beast sacrifice an artifact or creatureSet: Secret Lair Drop Series Type: World Enchantment Rarity: Rare Cost: {G} All creatures have haste. The endless spectral procession crashed against the Envoy's hiding spot. "What are you," they taunted, "fighter or failure? Give in, daughter of the dead, and join your ancestor in eternal slumber."