Bell Borca, Spectral Sergeant

Mana cost: {2}{R}{W}
Type: Legendary Creature — Spirit Soldier
Power / toughness: * / 5
Set: Commander Legends #271 (rare)
Price: $0.25 USD

Note the mana value of each card as it's put into exile.
Bell Borca's power is equal to the greatest number noted for it this turn.
At the beginning of your upkeep, exile the top card of your library. You may play that card this turn.

Bell Borca, Spectral Sergeant has 4 printings, first in Commander Legends (2020). EDHREC ranks it #17,509 among Commander cards. It appears most in General Ferrous Rokiric decks (756 on EDHREC). 1 public deck on TCG runs it. It has 7 official rulings.

Legality

commander: legal
legacy: legal
vintage: legal
pauper: not legal
modern: not legal
pioneer: not legal
standard: not legal
brawl: not legal

Public decks that run Bell Borca, Spectral Sergeant

Legends' Legacy - Dominaria United, led by Dihada, Binder of Wills

Commanders that run Bell Borca, Spectral Sergeant most

Deck counts from EDHREC.

General Ferrous Rokiric: 756 decks
Pia Nalaar, Consul of Revival: 284 decks
Commander Liara Portyr: 169 decks
The War Doctor: 14 decks
Razia, Boros Archangel: 13 decks

Often played with Bell Borca, Spectral Sergeant

Cards that show up in the same decks on EDHREC.

Rulings

2020-11-10: You'll still pay all costs for a spell cast this way, including additional costs. You may also pay alternative costs if any are available.
2020-11-10: If a card in exile has {X} in its mana cost, X is considered to be 0.
2020-11-10: You must follow the normal timing permissions and restrictions for the card exiled by Bell Borca's last ability. If it's a land, you can't play it unless you have land plays available.
2020-11-10: If you don't play the exiled card, it remains exiled.
2020-11-10: Look at the card in exile, not its previous zone, to determine its mana value.
2020-11-10: While not on the battlefield, and before any cards are noted for it each turn, Bell Borca's power is 0.
2020-11-10: Bell Borca notes mana values only if it's on the battlefield as a card is put into exile.