pokemon cards tapu koko (SM31) [Sun & Moon: Black Star Promos] this attack does 90 more damage. Tapu Koko ex - Deluxe

Here they are in alphabetical order

While reverse holos can be valuable in vintage sets like Skyridge, standard reverse holos, including Poke Ball reverses, typically don't cost more than a few dollars

Necrologia A little blast from the past coming from the Exodus set originally, Necrologia has a special qualification for an instant

6 Library Of Alexandria $1,900.79 Library of Alexandria is a somewhat strange inclusion on this list, given that at first glance, its ability is useful, but not all that game-breaking by modern standards, due to the specificity of its activation

They are also strong at the ramping, and multiple one drop mana makers with no restriction on this break decks and formats, like Birds of Paradise and the Llanowar Elves speeding up Fires of Yayimaya to dominate Standard as a second turn drop

But theres also value in having some of these cards work better within the 99 instead of leading a deck