Its an uncommon from a Standard MTG set, but if you know anything about Modern circa late 2023, youll understand why its here
Performapal Barokuriboh X DARK Level 8 [ FiendPendulumEffect ] ATK 300 DEF 3000 P Scale 1 Once per turn, at the start of the Battle Phase: You can add 1 monster with 300 ATK/200 DEF from your Deck to your hand, then destroy this card
These are creatures that are hard to block and/or hard to deal with
Yawgmoths Will For one turn, you basically get to replay your graveyard like its a second hand, and thats exactly as unfair as it sounds
Nothing is being cast
Being only one mana allows you to fill out your mana curve nicely where otherwise you would have unspent mana, and it provides a bit of extra selection to help you find either lands or spells, so the act of casting it smooths your curve, and the act of surveilling also helps smooth your curve on future turns