The Great Juggernaut (Unknown Event #RR04b)

The Great Juggernaut {3}{R}

Legendary Artifact Creature — Juggernaut

At the beginning of your upkeep, sacrifice The Great Juggernaut unless you discard a card.

Whenever The Great Juggernaut attacks, shuffle your library then exile the top card of your library. You may play that card without paying its mana cost this turn.

5/3
Standard
Alchemy
Pioneer
Explorer
Modern
Historic
Legacy
Brawl
Vintage
Timeless
Commander
Pauper
Oathbreaker
Penny