I have no idea what the actual wording to make this work would be, if such wording is even currently feasible. This is meant for cards like Orzhov Charm and Cryptic Command.

What's X?

­Throne of Bone feels unappreciated.

Interesting use of the legendary hoop to make this slightly asymmetric.

Wording can certainly be made to work. Maybe "Chooses a mode, they may instead choose X modes, where..."

This might be better, but I'm not sure.

"When choosing modes for a modal spell [or ability?], a player who controls a legendary permanent may choose one additional mode for each Bone counter on ~. The same mode can't be chosen more than once this way."

• I think this costs too much for something that applies to everyone.
• Why does this apply to everyone?

When I conceived the idea, I felt that the throne could be taken by anyone. I considered making an equipment anyone could use, but that was an extra, uncommon thing that didn't relate to what I wanted to capture. There would have been a buff for the creature if Bone Throne had ended up like that, but again, that was never the intended focus.

Cost idk on. This wants to exist with at least a cycle of modal instants and/or sorceries. The problem is how many cheap creatures that can sa themselves are going to around. Since there's no guarantee the opponent is playing modal, this can start gaining counters turn two, which could make the model spells too swingy maybe.