tiamat mtg commander deck Magic The Gathering - (235) Tiamat Commander Deck Guide -

It's a little complicated, but copying spells at mana cost = power than pumping is like a sort of Birthing Pod variant, and fits into Simic really well

Dream Eater is very evocative of a nightmare sphinx

The card quality of the enablers in particular is top-notch combine that with the strong interaction of Mardu colors and you get a precon where bad draws are rare and you can easily back up the pressure applied naturally as you reanimate aggressive creatures

Infect / poison ten poison counters, and your life is irrelevant

I make my own card evaluation first, then lean on Arena Tutor for data with card ratings and pick orders