If you like durdly 4-card combos then toss Myr Moonvessel into your Koll, the Forgemaster deck with Goblin Bombardment and an equipment you can equip for 0, like Shuko
VMAX cards can be quite powerful and expensive in the Pokemon TCG
After looking at all the options, it was decided not to do a creature kill option because it could be blanked if there was no creature in play
Lightning Greaves, Swiftwood Boots, and Dragon Tempest are your friend here
In this deck you might make that swap, but in today's list Ghalta is going to serve as a very capable backup plan
Once per turn, if a Level 8 or higher Fish Synchro Monster(s) is Special Summoned from your GY, even during the Damage Step: You can destroy all monsters your opponent controls