mtg dragon's maze cards Magic The Gathering Booster Box – Baseball Card Exchange and are universally loved Sire of Insanity Dragon's Maze

Ich-Tekik, Salvage Splicer creates a 3/3 golem when he enters the battlefield and puts a +1/+1 counter on each of your golem creatures whenever an Artifact is put into the graveyard from play

Chthonian Nightmare The floor with Chthonian Nightmare is reanimating a 3-drop, which isnt good enough for Modern

Creature - Cat Snake Color tag templates(None) River Boa Islandwalk (This creature can't be blocked as long as defending player controls an Island.) : Regenerate this creature

Any "as [this permanent] enters the battlefield" or "[this permanent] enters the battlefield with" abilities of the copied permanent will also work

It sees a quite a bit of competitive play in Pauper

Sivriss, Nightmare Speaker supports sacrifice synergies and graveyard shenanigans, milling a card for each opponent upon sacrificing a creature, and then returning that card to your hand unless that player pays three life