Many of her followers have attempted to break her out of Avernusand failedbut even while she remains in the Nine Hells, Tiamat can send her aspect to manifest in the Material Plane
Every non-token creature enters with a bonus counter, then lets you scale proliferate equal to your creature count
If you like alternate wincons like Revel in Riches, you may like Hellkite Tyrant or Mechanized Production
Now, these don't enter the battlefield at the same time, but with a bit of stack wrangling you can get the same effect
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In it, powerful banned cards from other formats were rebalanced, and WotC says the response from players who had only ever played digitally was very positive albeit, entirely new digital cards are certainly a step further than temporary rebalances
