While it is hard to accelerate energy to Fighting-type Pokmon in the current format, this strategy has some potential as an anti-meta threat
Trinisphere makes everyone pay at least three mana to cast their spells
When determining which effects stop working and which are not, you need to read the card text very carefully (preferably in the Oracle!) Banisher Priest phases out, then the exiled card will not return, because Banisher Priest does not leave the battlefield, and the effect does not end
It has an omni-negate as protection/disruption, a bounce 1 when going second, 2 free cards for Gullveig to banish, and 4000 added damage to OTK an empty board with Odin, or Gullveig + Loki/Thor
The ability to exchange one resource for another gives players plenty of choice on how best to use their creatures, lands, and spells to find winning combinations (more info on the theory behind that here)
Regulation Marks What Are They