Buttercup, Provincial Princess gets +1/+1 for each color among other legendary permanents you control.
WUBRG: Search your library for a legendary permanent card with mana value less than Buttercup's power, put that card onto the battlefield, then shuffle.
![Buttercup, Provincial Princess - Sisay, Weatherlight Captain [Secret Lair Drop Series]](http://www.cosmicgames.com/cdn/shop/files/e54e310c-060c-40a9-a0e3-d35de672ef13.png?v=1773406001&width=1445)
