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That's silly and annoying. Darn.

Then maybe something like a revolt dual or life loss dual.

"~ ETB tapped unless you lost life this turn" or "~ ETB tapped unless a permanent left the...

The best solution I've seen to this is to print Legendar, Snow Duals of each type.
Legendary = functionally and objectively worse

It would reduce demand on duals notably, without violating the...