While this version of the creature is stronger in combat, transforming back into the Cathar triggers its exile clause
Special Summon from your Extra Deck, 1 "K9" Xyz Monster with a different name, by using that monster you control (this is treated as an Xyz Summon, transfer its materials to the Summoned monster), then you can destroy 1 card your opponent controls
Enforced with Abyss Prop - Wild Wagon, which has similar effects, and especially with their Field Spell, Abyss Playhouse - Fantastic Theater, which can alter your opponent's first activated monster effect and force it to destroy a Set Spell/Trap on the field - like an Abyss Script
Having these proxy decks/cards gets me unique artwork that I like and allows me to run proxies of cards I already own and may be in other decks or too expensive to play daily
The third Warchief only costs