Every The First Chapter Card
Lady Tremaine - Imperious Queen played in turn four thanks to Morph can spell an early disaster for your opponent, especially if they're either midrange or control
Look for a commander that provides: Mana assistance (ramp, cost reduction, or cheating Angels into play) Protection (hexproof/indestructible-style effects or shielding key threats) Lifegain synergy (payoffs that reward steady life gain and stabilize races) Thats the common thread behind the best Angel commanders in MTG : they make the tribe feel consistent instead of clunky
White Auracite is a different sort of removal because if it is somehow removed, the card exiled by the Auracite re-enters your opponent's side of the battlefield
More directly, the chance to play them for free makes song cards some of the best Lorcana cards in the game when paired carefully with the right characters, granting you powerful effects on your turn without any additional cost
The only thing Kroxa needs is a deck full of other cards that can reliably keep the graveyard full
