Kolvori's gadget, The Ringhart Crest really really wants to ramp for green legends. So there's a couple of options I considered:

1. Use the signpost uncommon legends from Kaldheim that are green plus another color. This isn't a great plan, because two of those legends are Maja, Hero of Bretagard and Moritte of the Frost, both of which have double pips of the non-green color. Plus most of the 'any color' ramp/fixing is reserved for Jorn.

2. Make a pack with 2 copies of Fynn, the Fangbearer and a mess of deathtouch creatures. This also isn't a great plan, because Fynn is a deathtouch-themed build-around. And also the other creatures with deathtouch (in Kaldheim at least) are black.

I went with option 3: recruiting legends from other planes. I bet Kolvori made a deal with Esika for some extra-planar help in exchange for those monstrous cats. Anyway, Kolvori's complement of common spells all have animal forms in their names.