The fastest way to get there is to be on World #330 since it’s the house party world, use the House teleport (runes), then find a host with high Construction level and enter his/her house and use the Portal Nexus to teleport to Lunar Isle. Portal Nexus Teleport, Old School Runescape...
Travel to the altars to imbue the guardian essence – you will obtain either Elemental or Catalytic Guardian Stone and runes according to the used portal. Use the guardian stone to charge up the Great Guardian. Ensure the Great Guardian has enough power to close the rift (keep charging him ...
11 degrees 03 minutes north 31 degrees 20 minutes east It's northwest of Canifis (the werewolf town) in the swamps, just above the river portal (must have completed Priest in Peril quest to get there). Go north to gate to new area, proceed slightly east. The spot is on the north ...
As with Agrith-Na-Na, drink your potions before going through the portal. When you get in, unleash three hally specials on him, if you brought a hally, and then change to your ranged weapon. Try to avoid letting him get near you by simply running along the side, unleashing 2 shots ...