yugioh cards ojama Yu-Gi-Oh! - Yellow (IOC-001) - Invasion of Chaos - Unlimited Edition Ancient Millennium series. Ojamatch - Yugipedia

The fallout from that banlist change is covered in the OP-15 meta tier list article linked below

Even better, you can target your own creatures and just opt out of paying to pick up and reuse valuable ETB effects, or save something from removal

As difficult to grade as it was to find on Mount Moon in the original video game, the sheer difficulty of grading this card makes it a worthwhile goal for collectors and investors alike

Good examples would be Salamangreat Violet Chimera, which gets a powerful ability if you use a different Salamangreat Violet Chimera as material, or Dual Avatar - Manifested A-Un, which gets a range of different powerful effects for summoning with different Fusion monsters