Research / Development Another interesting take on the genre, Research / Development is an incredibly slow wish effect despite its cheap cost
Unlike almost every other format or game type in MTG, a planar deck such as this one can easily be copied & proxied up to play with your playgroup, as most people won't mind too much, (except maybe your local store owners) Also, due to the fact that Planeschase usually goes hand in hand with casual formats, people are also going to be more lenient, since there isn't a lot of money or worth in the plane cards themselves
This may cause it to convert again when it deals combat damage to a player a second time
Long story short, take care of your cards
This was popular enough that we decided to start doing cameo mechanics in premier sets, usually at rare or mythic rare
One possibility would be giving the afflicted Pokmon a small chance to fail an attack