Although since making this reccommendation, I found an even better ITB-alike.by Mischief Maker 05/03/2021, 1:54pm PDT
Fights in Tight spaces (Early Access). Slay the Spire meets Into the Breach:
It's what it sounds like. You get a hand of 5 cards representing various actions (mainly attacks, building "block" points, and movement) and you start with a base 3 energy every round to play them. Between levels you can get the opportunity at the gym to remove and/or upgrade cards at the gym. Unlike Slay the Spire, the cost of upgrading a card scales with its rarity. There's also a rage mechanic that fills up with attacks, but drains from (most) movement abilities.
Menus and interface are still a little rough at the moment, and there's only one character class, but otherwise feels like a fully-fledged game so far.