The Purrely archetype allows players to attach spell cards to the XYZ monsters in the deck as material, and those cards allow the monsters to gain bonus effects
It requires a great deal of setup to be really useful
Whenever this Equipment becomes attached to a creature, for as long as this Equipment remains attached to it, that creature becomes a copy of a creature card exiled with this Equipment
Since you generally only have a small number of creatures, Silent Arbiter keeps you safe from a large field of creatures swinging at you
Its first attack, Frost Bullet, deals 110 damage to the opponent's active Pokmon, and only 30 damage to any benched Pokmon of the player's choosing
Decks running powerful lands often run land tutors to fetch them up, and Sylvan Scrying is one of the most popular options for this in Green