mtg bloomburrow red cards Season of Loss [Bloomburrow] thats another night of research spoiled The Most Valuable Cards From

The Soul Stone Oh, by the way, an Infinity Stone has been sighted

For Lost Caverns, those cards will include merfolk creature Lord of Atlantis and the Mana Crypt artifact

There arent a lot of these, but the few that do exist, Matoya, Archon Elder and Elvish Mariner in particular, can put in a ton of work

If such an ability requires a target, you can target a Room even if both of its doors are unlocked, but the ability won't do anything when it resolves

And Mono-Red Aggro and Izzet Phoenix play 1-2 copies of her in their sideboards

Titan also offers some mild utility as a sac outlet but being sorcery speed it really is mild