Spellgorger Weird is similar, but it gets a permanent buff instead thanks to +1/+1 counters
What I mean by that is if you start by looking at the Magic back and orient it upright and then flip the card over, Topsy Turvy is upside down
Conspiracies Adriana's Valor Advantageous Proclamation Assemble the Rank and Vile Backup Plan Brago's Favor Double Stroke Echoing Boon Emissary's Ploy Hired Heist Hold the Perimeter Hymn of the Wilds Immediate Action Incendiary Dissent Iterative Analysis Muzzio's Preparations Natural Unity Power Play Secrets of Paradise Secret Summoning Sentinel Dispatch Sovereign's Realm Summoner's Bond Unexpected Potential Weight Advantage Worldknit Similar to ante, conspiracies just dont really work in Magic games that aren't designed to specifically use them
Spells and abilities that cause players to gain life still resolve while Giant Cindermaw is on the battlefield
Kothophed, Soul Hoarder can net you all the cards in the world
Magic even has a variety of powerful effects that reward you for paying life, either in one go or over the course of several turns, so you can put the 20 or 40 life you start with to the best possible use