Dota 2: The International Compendium 2015 - Immortal Treasures I

Spirit Breaker: Iron Surge
Helmet with custom Charge of Darkness ability effect

Luna: Moonfall
Shield with custom Lucent Beam and Eclipse ability effects

Magnus: Shock Of The Anvil
Weapon with custom Shock Wave ability effect

Pugna: Draining Wight
Nether Ward with custom mana flare ability effect

Sand King: Barren Crown
Helmet with custom Burrow Strike ability effect

Huskar: Seering Dominator
Helmet with custom Life Break ability effect

Night Stalker: Black Nihility
Very rare full 5-piece item set with custom Void ability effect

Luna: Golden Moonfall
Extremely rare golden shield with custom Lucent Beam and Eclipse ability effects