(originally video games) ultra rare

not ... at all

even if ...,...cannot

very, exceedingly, awfully / (before a negative form) not at all, at all, by no means

rare (uncommon) / uncooked, especially when referring to cheesecake

(biblical) Leah

a rhea (flightless bird)

Alternative form of レアー (Reā, “Rhea”) (goddess) / Rhea (moon) / Rhea (asteroid)

value, worth

(informal) very; intensely; extremely