Gilgamesh, Master-at-Arms Series: From Final Fantasy V and later Spoiler Level: Low Well not exactly the unique effect, with multiple cards over the years representing similar abilities
As for the gameplay there's little amount of assist on the game's part, but you the player, have substantial control of creating tokens, adjusting amounts, and paying complicated costs
Dragons of Tarkir (2015) had two nice variants of Card not found
We got the venture mechanic that lets you literally explore a handful of new dungeon cards, plus some epic dragon cards like Icingdeath, Frost Tyrant
Although vulnerable to good spot and mass removal the EtB effect of Atarka means you are still pretty ahead if they do remove it
Shards of Alara Ooze Garden Puppet Conjurer Sarkhan Vol Puppet Conjurer was us playing in interesting new design space