pokemon tcg card back Design Pokemon TCG: 3 Booster Packs

What are the weaknesses and retreat cost of this Celebi card

Fuse (You may cast one or both halves of this card from your hand.) Illustrated by Steve Prescott Standard Not Legal Alchemy Not Legal Pioneer Legal Historic Legal Modern Legal Brawl Legal Legacy Legal Comp

This is another card that can only be played in Vintage, and even in this format it is restricted, that's how strong Yawgmoth's Bargain is

Being a mono-colour snow deck means you get to activate Faceless Haven more reliably due to your manabase not being muddied with non-snow lands such a Pathways, and enables you to play the full four copies of Haven without leading you to having too few coloured mana sources