Enre-hep High Muge

Is this Enre-Hep HM really as broken as he looks? For example, can he recast the same mugic his other creatures play in the same burst? In the same turn? Across the entire game?

It has to be played in the same burst. He's really strong especially using Hepptad's Crown. But when you ban Tonal Destruction and Najarin's Tower of Song - the most broken combos are gone. He could be used to wipe out your opponent's Mugic hand. Now he's capped at ~140 burn or maybe Unheard Melody a couple of times. We decided he's not ban-worthy even though he's resource advantage.

Never thought of using tonal destruction.. that is broken

I found another strat with Enre-hep HM that is making my buddy wanting to ban/change him altogether xD Heptadd's Crown on another creature and casting Discord of Disarming 3 more times with Enre-hep (after giving him a Mipedian Balladeers' Flute).

The counters I can think of are negating the mugic and its copies (if that's possible). Does this make it too op? My counter was that Mipedians lack mugic, so it comes at a cost.

There's been some cool combos with Enre-Hep. A variant can deal 260 burn with canon of casualty and Heptadd's Crown.
Using Strain of Infection and Ode to Obscurity to generate infinite counters on enre-hep.
He's absolutely broken.