Ace, Fearless Rebel is a rare Legendary Creature — Human Rebel card from Doctor Who (WHO), collector number 98. Current market price: $0.19 (foil $0.22), TCGplayer market prices via Scryfall.
Nitro-9 — Whenever Ace attacks, you may sacrifice an artifact. When you do, put a +1/+1 counter on Ace, then it fights up to one target creature defending player controls. Doctor's companion (You can have two commanders if the other is the Doctor.)