whenever an opponent discards a card mtg Megrim Tenth Edition Regular Uncommon Brewing Discard with The Haunt

Armaggon, Future Shark Captain Howler, Sea Scourge Jaws, Relentless Predator Shabraz, the Skyshark (+ Brallin, Skyshark Rider) Shark Shredder, Killer Clone There are five legendary sharks that can be your commander as of Secrets of Strixhaven , but none of them have abilities that care about other sharks

It has a draw subtheme and a cloning subtheme, but I wouldnt go so far as to say its optimized in either direction

Beast, Hardheaded provides one solution, allowing you to use its Break ability to banish an item of your choice when he enters play

Sarpadian Simulacrum

1 Brutal Hordechief

The ETB trigger gives immediate value while the first activated ability hits everything