Valley Floodcaller + Sensei's Divining Top + Poison Dart Frog + Madame Web, Clairvoyant

Valley Floodcaller

Sensei's Divining Top

Poison Dart Frog

Madame Web, Clairvoyant

How it works

1. Activate Poison Dart Frog's first ability by tapping it, adding 1.
2. Activate Sensei's Divining Top's second ability by tapping it, causing you to draw a card and put Sensei's Divining Top from the battlefield onto the top of your library.
3. Cast Sensei's Divining Top from the top of your library by paying 1.
4. Valley Floodcaller triggers, giving Birds, Otters, Frogs and Rats you control +1/+1 until end of turn and untapping them.
5. Repeat.

This charming loop turns a humble Frog and a spinning top into a self-sustaining engine by leveraging the top-deck freedom granted by Madame Web, Clairvoyant. Once you tap Poison Dart Frog for mana, you can use that exact resource to pay for Sensei's Divining Top's draw ability, tucking the artifact safely back onto your library. Because Madame Web lets you cast noncreature spells right off the top, you simply replay the Top, which triggers Valley Floodcaller to cleanly untap your Frog and ready it for another iteration.