does getting punched by gold experience requiem kill you immediately? if not, how does his ability work?

When any of these are attacked indiscriminately, the creation will not be harmed at all instead, the attacker receives the pain they would have inflicted, which can kill them. Though only shown once, Gold Experience can also speed up an already-existing plant's life through its ability, causing it to wither and expire immediately as a result of a greatly shortened lifespan.