Abaddon is a melee character. His primary attribute is strength. The hero is mainly taken as a support or hardlaner. Most effective in the early and late game.
The Mist Coil and Aphotic Shield abilities make the laning stage easier for his carry. With Curse of Avernus, Abaddon makes the enemy easy prey for allies in the early game. Borrowed Time is the hero's ability, which allows him to take a lot of damage. Being upgraded with Aghanim's Scepter, this ability makes Abaddon's team ready for mass fights and allows it to stand almost any enemy initiation. Aghanim's Shard upgrades the Curse of Avernus ability allowing Abbadon to deal more significant damage in a fight.
The Font of Avernus is the source of a family's strength, a crack in primal stones from which vapors of prophetic power have issued for generations. Where others trained with weapons, he bent himself to meditation at the font, which turned him into a creature of the black mist.