Dragon Arch [Apocalypse] Bolas's Meditation Realm if you control no monsters:

if you control no monsters: Target 1 Xyz Monster in your Graveyard that was destroyed this turn and 1 monster in your Graveyard with ATK less than or equal to that Xyz Monster's

"Brackish water

you can Normal Summon it to have it be treated as an Effect Monster with this effect: • Once per turn

destroy target creature

and is sent to the Graveyard during the End Phase

Dragon Arch [Apocalypse] Bolas's Meditation Realm if you control no monsters:Set: Apocalypse Type: Artifact Rarity: Uncommon Cost: {5} {2}, {T}: You may put a multicolored creature card from your hand onto the battlefield. In their hunger for the arch's power, mages often forget that it only makes dragons easier to summon. It doesn't make them easier to control.