I think the best fodder are ones that replace themselves or have some sort of effect when they enter the battlefield since theyve already provided value coming in, so the body is fine to use going out
It can provide acceleration in almost any way possible, and is generally revered for its ability to do so
Ancient Cornucopia One of my favorite cards to run in multicolor decks due to its ability to stabilize, Ancient Cornucopia gives you steady lifegain whenever you cast a multi-color spell while also fixing your mana
You can build around tokens, artifacts, draw-two payoffs, fish detectives, payoffs for Clue tokens, or even go the Voltron commander route if you so desire
This deck died down over time, especially when Mox Opal was originally banned (Mox Opal is back, but there are plenty of stronger combo options in Modern than Cheerios)