slay the spire card sleeves Sleeve Kings Bundle Card Sleeves [Description] Protect your Here to Slay cards and make them last Here to Slay: Standard Size

This is from Gatherer's rulings on Toshi

Designed for strategic play with a mix of powerful creatures, spells, and land cards like Mountain, Plains, and special lands

[97] Declaring that it was time for their final Duel, Bohman took Ai and Playmaker to Mirror LINK VRAINS' Central Station Courtyard and claimed that the door to a new world would open after their Duel

If you have no Spell/Trap Cards in your Graveyard: You can halve this card's original DEF until the end of this turn, and if you do, this card can attack your opponent directly this turn

Karumonix, the Rat King is more easily built as a budget commander (my own deck currently tracks at under $100)