mtg return to ravnica cards / At the beginning of your upkeep Swamp MTG - Return to

Add in a few wincons like Stuffy Doll or Psychosis Crawler and then supplement the deck with card draw, bounce effects, and whatnot

Mutated Cultist Mutated Cultist is going to ruin so many energy players hopes and dreams

This is also why cards that care about you casting spells will see artifacts

came with plenty of fun, flavorful cards but they really flopped when it came to generating Energy

That said, always having access to the top card of the library is very useful, and there aren't a lot of cards that allow players to cast any card from the top

It's barely even altering - one might call it something akin to paint-by-numbers it's so easy