Delina, Wild Mage + Lightning Runner + Harmonic Prodigy + Sage of Shaila's Claim

Delina, Wild Mage

Lightning Runner

Harmonic Prodigy

Sage of Shaila's Claim

How it works

1. Declare Delina and Lightning Runner as attackers, triggering Delina twice and Lightning Runner once.
2. Resolve a Delina trigger, creating at least one token copy of Sage of Shaila's Claim that enters the battlefield tapped and attacking.
3. When the Sage of Shaila's Claim token(s) enter the battlefield, they trigger, causing you to get at least EEE.
4. Repeat from step 2 for the remaining Delina trigger.
5. Resolve the Lightning Runner trigger, causing you to get EE and pay eight E to untap all creatures you control and to get an additional combat phase after this one.
6. At the end of your combat phase, each creature token created by Delina triggers, exiling themselves.
7. Repeat each combat phase.
8. Once you have infinite E, you may target any other creature(s) you control.

This explosive loop relies on Harmonic Prodigy to double up the triggered abilities of your Wizards and Shamans, most notably amplifying Delina, Wild Mage whenever she enters the fray alongside her allies. As Delina attacks, her cloned copies of Sage of Shaila's Claim flood the battlefield with a mountain of energy counters to fuel the madness. This freshly generated energy directly feeds Lightning Runner, allowing you to repeatedly pay its steep cost to untap your entire board and rip through an endless succession of additional combat phases.