Kiora Bests the Sea God (Promo Pack) [Theros Beyond Death Promos] Cat Glimmer Tocasia's Onulets contained magical essences

Tocasia's Onulets contained magical essences that could be cannibalized after they stopped functioning

Set: Secret Lair Drop Series Type: Enchantment Rarity: Rare Cost: {3}{G} At the beginning of your upkeep

Set: Secret Lair Drop Series Type: Instant Rarity: Rare Cost: {3}{U}{U} You may exile a blue card from your hand rather than pay this spell's mana cost

Set: Commander Masters Type: Enchantment Rarity: Mythic Cost: {3}{W} All that glitters is yours

then meld them into Urza

Kiora Bests the Sea God (Promo Pack) [Theros Beyond Death Promos] Cat Glimmer Tocasia's Onulets contained magical essencesSet: Theros Beyond Death Promos Type: Enchantment Saga Rarity: Mythic Cost: {5}{U}{U} (As this Saga enters and after your draw step, add a lore counter. Sacrifice after III.) I Create an 8 8 blue Kraken creature token with hexproof. II Tap all nonland permanents target opponent controls. They don't untap during their controller's next untap step. III Gain control of target permanent an opponent controls. Untap it.