Abyssalbane ore is made by casting Tune Bane Ore on an abyssal item with Bane ore in the inventory, requiring 87 Magic and giving 90 experience. The abyssal head can be in the inventory, or in a player-owned house. Doing so brings up a Make-X menu, allowing all of the ores to be attuned in one click, immediately. With 77 Smithing, it can be smelted into an Abyssalbane bar.
Note: These items are not consumed when they are used to tune bane ore.