pokemon trading card game scarlet and violet surging sparks TCG: & while new Ace Spec cards and more new Pokémon ex bring surprises of their own Pokémon TCG: Scarlet & Violet-Surging

(12/8/2022) Any cards drawn prior to Sylvan Library's ability resolving, including in your upkeep or in response to Sylvan Library's triggered ability, can be chosen to be put back using this effect

This gives you infinite Dualcaster tokens with haste, infinite enter-the-battlefield triggers, and potentially infinite card draw if Shadow the Hedgehog is on the battlefieldeven if you cant swing in right away

Your playgroup will be glad to know that Im not suggesting you build Hokori

Mana Crypt is on the MTG banlist in every format except for Vintage, where players are restricted to a single copy, but it does see substantial play there