Otarian Juggernaut is a rare Artifact Creature — Juggernaut card from Odyssey (ODY), collector number 305. Current market price: $0.31 (foil $1.20), TCGplayer market prices via Scryfall.
This creature can't be blocked by Walls. Threshold — As long as there are seven or more cards in your graveyard, this creature gets +3/+0 and attacks each combat if able.