Arcane Boots

A core Boots upgrade to have some much needed mana sustain to spam Decay for fighting and farming. Can be upgraded to Guardian Greaves later in the game.

Aghanim's Shard

A situational item that gives you a save for yourself or an ally with Tombstone. Works well against single target initiations such as Duel.

Aghanim's Scepter

An incredible pick up for Undying to become extremely tanky with HP pool through Decay while making enemy heroes much weaker. Has great synergy with Flesh Golem to do massive right click damage in teamfights.

Shiva's Guard

A core item that gives you some much needed armor and reduces healing in an AoE around you. Works well against illusions and summons along with your AoE spells.

Soul Ring

A core item that helps with mana sustain to spam Decay for fighting and farming. Also makes you tanky with armor and HP pool.

Blade Mail

A core item that uses your high HP pool to reflect damage back to enemy heroes. When you choose to build Blade Mail, get it as your first major item and rush Eternal Shroud and Aghanim's Scepter afterwards to make it more effective.

Magic Stick

Helps you sustain HP and mana as Undying frequently uses Decay to harass and secure last hits.

Wind Lace

Gives you movement speed to kite or chase down Undying. Also counters the movement slow from Tombstone zombies.

Boots of Speed

Gives you movement speed to kite or chase down Undying. Also counters the movement slow from Tombstone zombies.

Lets you attack faster to destroy the Undying Tombstone quickly and instantly kill all the zombies.

Glimmer Cape

Gives you an invisibility tool to kite Undying and save yourself or an ally slowed by Tombstone zombies. Going invisible instantly kills any zombies chasing you.

Force Staff

Gives you a repositioning tool to kite Undying and push yourself or an ally to safety when slowed by Tombstone zombies.