Sage of Fables + Berta, Wise Extrapolator + Wizard Class + Training Grounds

Sage of Fables

Berta, Wise Extrapolator

Wizard Class

Training Grounds

How it works

1. Activate Sage of Fables by paying 1 due to Training Grounds and removing a +1/+1 counter from a creature you control, causing you to draw a card.
2. Wizard Class triggers, putting a +1/+1 counter on Berta.
3. Berta triggers, adding 1.
4. Repeat.

This engine spins into motion by leveraging Training Grounds to slash the activation cost of Sage of Fables' card-drawing ability down to a single mana. As you remove counters to draw, Wizard Class ensures that every single card drawn triggers its Level 3 ability to place a fresh +1/+1 counter back onto a creature. That influx of counters fuels Berta, Wise Extrapolator's mana-generating trigger, providing the exact energy needed to sustain the loop indefinitely while simultaneously growing your board.