: When Abaddon, the Lord of Avernus has less than 3 loyalty, effects that damage Abaddon cause it to gain loyalty instead

+1: Until the start of your next upkeep, the next time a source would deal damage to Abaddon, the Lord of Avernus, prevent that damage. If damage is prevented this way, deal that much damage to target creature an opponent controls

0: Until end of turn, Abaddon, the Lord of Avernus becomes a 3/* Wraith creature with indestructible, where * is Abaddon's loyalty. If Abaddon deals combat damage to a player, that player can't cast instant or sorcery spells until the beginning of their next end step

-1: Deal X damage to Abaddon, the Lord of Avernus and any other target. X cannot exceed Abaddon's loyalty