This game might be considered Wizards of the Coast's pride and joy, but Wizards owns another, even older and more established franchise with millions of fans around the globe: Dungeons & Dragons
(2024-09-20) The ninjutsu ability can be activated during the declare blockers step, combat damage step, or end of combat step
Its easy to imagine a group of Kecleon behaving like this in the wild
This idea spawned a mono-red control deck that used burn spells to control the board before using Irencrag Feat to cast Ugin a lot earlier than expected, taking full control over the game from that point
On top of that, the ability to scale its damage with additional mana makes it a flexible tool in the mid-to-late game
Its still locked to a hyper-specific archetype and still has that issue of not wanting to knock a player out with poison too early, lest you give up some of your precious card advantage