if you have a creature with Expend 4 and trigger it by spending your 4th mana in a turn, you wont trigger it again when you spend your 8th
By sacrificing your own board with it on the stack, and by pre-emptying your opponents yards with anything from a Soul-Guide Lantern to an Author of Shadows, you can simultaneously wipe the board, get a load of EtBs, and slingshot into the lead
Decayed is a keyword that predominantly affects zombie tokens
Technically, the Gilt-Leaf Winnower can't destroy itself because it's an Elf and the card only hits non-Elf creatures, but it's cool that the card defines imperfection in a way that it (almost) fits
As the release date for Secrets of Strixhaven draws near, it seems the MTG markets are heating up
It sacrifices itself on entry, but you can cast it from the graveyard via escape to turn it into a recurring threat