Abilities are divided into a few categories, based on when and how they can be used
Mewtwo EX and Full Art Mewtwo EX (XY Evolutions) occupy an interesting middle ground in the Mewtwo market
Power Conduit is a two-mana artifact that you can tap to remove a counter from anything you control to either: Put a charge counter on an artifact Put a +1/+1 counter on a creature Charge counters probably wont be too relevant but a +1/+1 counter in exchange for never permanently losing your creature is a solid swap
Genre(s) Digital Card Game, Strategy Platform(s) Nintendo Game Boy Color
Haunted Dead 3B Creature Zombie 2/2 When Haunted Dead enters the battlefield, put a 1/1 white Spirit creature token with flying onto the battlefield
Also various reprints have been revealed: Professor's Research (but in Professor Juniper) Air Balloon, Prism Energy, Cheren, Energy Retrieval, Dynamotor Eelektrik