You have what I like to call diamond eyes, where your desire for owning a valuable card is making you blind to the very real and accurate sage advice that seasoned collectors are providing to you
If that creature's toughness is greater than its power when it enters, the ability will still trigger and resolve normally regardless of what happens to that creature after that
Lets do a limerick next time, eh WotC
Frontend & User Experience React + Next.js: Smooth user interface for scanning NFC, managing NFTs, and viewing collections
Basically, they sit outside the game (but not in a sideboard slot), get put into the Command Zone, and from there they generate effects
You can target 1 "Nordic" Monster in your GY, except "Grenbrust of the Nordic Beasts"