yugioh xyz spell cards Pojo's Yu-Gi-Oh! Card of the Day equip that monster from your GY to that monster on the field as an Equip Spell with these effects Xyz (Yu-Gi-Oh) - NamuWiki

Easy to Apply: Simple peel-and-stick design allows you to apply the skin quickly and without bubbles

How on Earth could they go backwards

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Apart from mutate cards to trigger that ability, I guess you could use Stuffy Doll and Brash Taunter, or fill your deck with cards that grant abilities to your commander like backgrounds and the legendary familiars (Kediss, Falthis, et al)

You may sign me up any time

On the second turn, you get a 1/1 green Saproling creature token