Vitaspore Thallid Haste was color-shifted in green in Planar Chaos , resulting in the release of Vitaspore Thallid among others
Jagged Poppet Being forced to discard cards from your hand any time your creature is dealt damage would be a mostly huge drawback in almost any deck, but youre gonna be playing Jagged Poppet in decks that already want to keep their hands empty, reducing the risk of that drawback being a problem
My first thought is how insane this version of Kefnet is with draw spells
Trigger: Activate this cards [On Play] effect
(At the beginning of your upkeep, put an age counter on this permanent, then sacrifice it unless you pay its upkeep cost for each age counter on it.) At the beginning of each players upkeep, that player sacrifices a green or white permanent of their choice
These are prime examples of what works best with Muldrotha effects on permanents that put themselves into the graveyard, allowing you to replay them again and again