While this version of the creature is stronger in combat, transforming back into the Cathar triggers its exile clause
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
The odds of pulling one of them is one out of 96 packs
Still, using it to recur Teferi, Time Raveler cant be bad
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
For a breakdown of how the YuGiOh Master Duel crafting system works, read on