Thundermare [Portal] Urza's Legacy Promos then sacrifice it unless you

then sacrifice it unless you pay its upkeep cost for each age counter on it

When The Scarab God dies

Set: Ixalan Treasure Chest Type: Legendary Enchantment // Legendary Land Rarity: Rare Cost: {2}{G} When Growing Rites of Itlimoc enters the battlefield

" —Great Threshold of Monserkat inscription

Set: Amonkhet Invocations Type: Legendary Creature — God Rarity: Mythic Cost: {2}{G} Deathtouch

Thundermare [Portal] Urza's Legacy Promos then sacrifice it unless youSet: Portal Type: Creature Elemental Horse Rarity: Rare Cost: {5}{R} Haste (This creature can attack and {T} as soon as it comes under your control.) When Thundermare enters the battlefield, tap all other creatures.