Other prominent mechanics that incorporate (or freely enable) sacrifice include: Food, Clues, Treasures, Sagas, Unearth, Encore, Evoke, any other temporary tokens such as Faerie Artisans or Hostility, cards with Upkeep, Quests, Exploit, Casualty and now Bargain
I usually hate 3-mana ramp spells (reprint Rampant Growth you cowards!), but I like this one well enough
Im skeptical of this kind of thing in Modern, but it has substantially exceeded my expectations in Standard, so I think it has some chance in Modern
A Pokemon TCG collector stumbled upon a genius use for fake Pokemon cards while out shopping, coming across a charity shop using imitation cards as eye-catching price labels