Ob Nixilis, Captive Kingpin
Agatha's Soul Cauldron
Deathbringer Thoctar

   Prerequisites

What do I need to start this combo?
Deathbringer Thoctar in exile (Deathbringer Thoctar exiled by Agatha's Soul Cauldron in exile).
Ob Nixilis and Agatha's Soul Cauldron on the battlefield.
Ob Nixilis has at least one +1/+1 counter on it.

   Steps

How does this combo work?
1
Activate Ob Nixilis using Deathbringer Thoctar's ability by removing a +1/+1 counter from it, dealing 1 damage to an opponent.
2
Ob Nixilis triggers, putting a +1/+1 counter on itself and exiling the top card of your library.
3
Repeat.

   Results

What do I get from this combo?
Exile your library
Infinite damage
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