Seek Bolas's Counsel (Mystery Booster Playtest Cards 2021)

Sorcery - Choose one at random Ñ
¥ You get an emblem with "At the beginning of your upkeep, pay {U}{B}{R}. If you don't, you lose the game."
¥ Each player discards their hand.
¥ Planeswalk to Pools of Becoming. (Once there, you can roll the planar die only if you're playing Planechase.)
¥ For each opponent, exile cards from the top of their library until you exile a nonland card. You may cast those cards without paying their mana costs.
¥ Destroy all creatures and non-Bolas planeswalkers.
¥ You get an emblem with "You can cast nonland cards from your sideboard."