Necrotic Ooze
Wizard Class
Devoted Druid
Talas Researcher

   Prerequisites

What do I need to start this combo?
Necrotic Ooze and Wizard Class on the battlefield.
Devoted Druid and Talas Researcher in your graveyard.
Wizard Class is level three. Necrotic Ooze does not have summoning sickness. It is your precombat main phase.

   Steps

How does this combo work?
1
During your precombat main phase, activate Necrotic Ooze using Talas Researcher's ability by tapping it, causing you to draw a card.
2
Wizard Class triggers, putting a +1/+1 counter on Necrotic Ooze.
3
Activate Necrotic Ooze using Devoted Druid's second ability by putting a -1/-1 counter on it, untapping it.
4
Repeat.

   Results

What do I get from this combo?
Infinite card draw
Infinite draw triggers