>>96078111
>>96078970
This card, grug, is a good example of this when compared to “Fren Towards Enemy”:

they both have transmuting effects, but Grug, a [red] card, is comprised of the fire and earth elements, so his transmuting effects are limited to entities (fire) or structures (earth).
While Fren Towards Enemy is a fren (tetrapolar), so its transmuting effect can target any manifest card (fire, air, water, earth).

Grug is really good card because it can target itself at both transmutation types: ie it can infinitely loop itself through the two types. If Grug had another effect, he would be able to use it infinitely by constantly reprojecting (mtg “phasing”) himself via transmutation. But because he doesn't the possibilities are limited.

It is possible to add effects to Grug through Frenning (combining stats and effects into a single card). However, frenned cards have autism (mtg “summoning sickness”) upon projection, so this would stop the infinite loop, but enable repeated usage of “once while manifest” effects, which are generally energy removal (mtg land destruction)

the upside down text you see on Grug is an Energy (mtg land/manna) effect. There are no dedicated energy (land) cards. Any card can be an energy (land) by playing it upside down into the energy zone (once per turn) from your hand. This is more similar to the Duel Masters mechanics.

grug is more broken because it can target itself at both destinations