Cyclopean Tomb [Collectors' Edition]

Cyclopean Tomb [Collectors' Edition]Set: Collectors' Edition Type: Artifact Rarity: Rare Cost: {4} {2}, {T}: Put a mire counter on target non Swamp land. That land is a Swamp for as long as it has a mire counter on it. Activate only during your upkeep. When Cyclopean Tomb is put into a graveyard from the battlefield, at the beginning of each of your upkeeps for the rest of the game, remove all mire counters from a land that a mire counter was put onto with Cyclopean Tomb but that a mire

the only caste that cannot be attained by either heredity or money is that of the hero

Some cathars succumbed to despair at Avacyn's unmaking

You may have Activated Sleeper enter the battlefield as a copy of any creature card in a graveyard that was put there from the battelfield this turn

Set: Commander 2019 Type: Land — Gate Rarity: Common Rakdos Guildgate enters the battlefield tapped

Surtland Flinger deals damage equal to the sacrificed creature's power to any target

and I *have* tried

Set: Commander Collection: Black Type: Land Rarity: Rare {T}: Add one mana of any color in your commander's color identity

Set: Strixhaven: School of Mages Promos Type: Creature — Vampire Warlock Rarity: Rare Cost: {2}{B} When Callous Bloodmage enters the battlefield

Set: POP Series 2 Type: Grass Rarity: Uncommon Retreat cost: Colorless

Set: Commander 2021 Type: Legendary Planeswalker — Daretti Rarity: Mythic Cost: {3}{R} +2: Discard up to two cards

+1: Add {R}{R}

Set: Commander Legends Type: Enchantment — Aura Rarity: Uncommon Cost: {2}{W} Enchant creature