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
So, even though the mechanic comes with a certain quantity of complexity to its name due to the decisions that it forces the player to take, I still think Evendo, Waking HavenEvendo, Waking Haven is so clearly powerful and synergistic with itself that it deserves the title
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