A creature "has a hat" if the creature depicted in the art is in possession of a hat
There is a lot of crossover potential, and cards that are good in multiple deck archetypes like Bloodghast (good in aggro and Smallpox archetypes) or Snapcaster Mage also work to fill your quota
If you do want to attach stuff to your opponents creatures, play auras instead
Based on the last 90 days of TYPA restock data, Pokemon restocks about 3,680 times per week on average across the 25 retailers TYPA tracks
OP-16 returns to the war that defined One Piece for a generation of fans: Impel Down into Marineford
Kardur, Doomscourge - Goad is a fun and powerful mechanic, and while its not specifically called that on the card, thats what this guy does to all your opponents creatures on ETB