This didnt come up often outside MTG formats that play Urza's Saga and Blood Moon
Table of Contents show How Does Rebound Work
Even Colorless Basic Pokemon that can be splashed into any deck can make you a tougher opponent to deal with
Ashiok, Dream Render Bloodbraid Marauder Bomat Courier Breeches, Eager Pillager Chandra, Pyromaster Chimil, the Inner Sun Circu, Dimir Lobotomist Codie, Vociferous Codex Colfenor's Plans Connecting the Dots Daring Discovery Daxos of Meletis Demonic Dread Diversion Specialist Dungeon of the Mad Mage Etrata, Deadly Fugitive Etrata, the Silencer Extirpate Feldon, Ronom Excavator Flameskull Flash of Insight Grma, Saruman's Footman Guile Headliner Scarlett Ire Shaman Jeskai Infiltrator Lich's Duel Mastery (playtest) Lightning, Security Sergeant Memory Vessel Narset Transcendent Neverending Torment Planeswalkerificate (playtest) Raphael, Most Attitude Redcap Gutter-Dweller Slaughter Games Thada Adel, Acquisitor Undying Flames Visions of Phyrexia
So you can definitely expect Umastryx to survive most attacks from your unwary opponent.
