Other Yidris ideas:
-Living End into a lot of cycling creatures. The deck is a bit janky honestly, but gives you a chance to play with
Fluctuator.
-Wheels, Nekusar-esque. Could be incorporated into the
Living End deck as a way to ditch creatures into the graveyard quicker.
Unless you go the more typical storm approach to Yidris, I find him a bit difficult to build around. I love the cascade component, but it ain't obvious building around it. On top of it, in order to trigger his cascade, you need to connect with combat damage, which implies that you need ways to protect him and get him through. At times, that can be a lot of hoops to
jump through for an effect that may not yield much in a less optimized non-storm deck.