From my first go-round with Magic , I remember Pit Scorpion from Legends, which seemed like a weird mechanic at the time and was difficult to build around, but that card basically had Poisonous spelled out - if it did damage, the damaged player also got a poison counter
They are cheap and efficient, and Sol Ring even nets you mana the turn you play it
nor does it have the correct rarity for certain cards listed.)
Luffy Alt Art from OP09 , because it features Rush , 10,000 Power , and card draw, making it a dominant finisher in high-level play
Arena Anthology 1 is heavy on artifacts, while Arena Anthology 2 aims for broader, cross-format spice
not the reactive Rewind style, so this is probably fine, but you can be sure that unwind was heavily vetted to ensure it wasn't broken