yugioh dawn of majesty deck 1st Edition Booster Box : Toys & Games hosts a gathering of Gizmeks Dawn of Majesty | YuGiOh

1UBRLegendary Creature Human Noble Villain Whenever you discard one or more land cards, each opponent loses 2 life

It's a variant on the level up mechanic that uses triggered abilities instead of mana payment to level up

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

TEMPORAL TRESPASS A nice reprint here for people that like extra turns

Therefore, why would I do that with Petilil when I could do it with Mew