mtg commander spirit deck Secrets of Strixhaven Set Crimson Vow Commander Upgrade Guide:

Though he was powerful enough to resist the banishment, he was weakened from forcing his way through the barrier between realms

If it becomes a creature, the creature has haste

This enables a combo turn where every creature can tap for huge amounts of mana, allowing you to chain spells and win on the spot

Apply orange leaf to a wound at dawn to clean it, at dusk to prevent the same injury from happening again. Kithkin superstition Illustrated by Scott Hampton Standard Not Legal Alchemy Not Legal Pioneer Not Legal Historic Not Legal Modern Legal Brawl Not Legal Legacy Legal Comp

For full disclosure, Kykar, Winds Fury and an instant Pyroclasm arent the only reasons I am heavily considering Core Set 2020 the bringer of Jeskai Control

Alternatively, you could copy an enchantment like City on Fire, allowing Terra to one-shot a player with commander damage in this form