Incubation Druid
Cloudstone Curio
Frog Tongue
Nature's Chosen

   Prerequisites

What do I need to start this combo?
Frog Tongue in hand.
All other permanents on the battlefield.
Nature's Chosen attached to Incubation Druid. Incubation Druid has at least one +1/+1 counter on it. You control a land that can tap to produce . Incubation Druid does not have summoning sickness.

   Steps

How does this combo work?
1
Activate Incubation Druid by tapping it, adding .
2
Activate Nature's Chosen by paying 0, untapping Incubation Druid.
3
Cast Frog Tongue by paying , attaching it to Incubation Druid.
4
Frog Tongue enters the battlefield, triggering itself and Cloudstone Curio.
5
Resolve the Frog Tongue trigger, causing you to draw a card.
6
Resolve the Cloudstone Curio trigger, returning Nature's Chosen from the battlefield to your hand.
7
Cast Nature's Chosen by paying , attaching it to Incubation Druid.
8
Nature's Chosen enters the battlefield, triggering Cloudstone Curio, returning Frog Tongue from the battlefield to your hand.
9
Repeat.

   Results

What do I get from this combo?
Infinite card draw
Infinite draw triggers
Near-infinite mana lands you control can produce
Near-infinite storm count