mtg whenever you deal damage draw a card Cards, (Commander / EDH Deck) Daring Saboteur - Ixalan -

For just three mana and sacrificing an artifact, Tinker lets you tutor any artifact in your deck directly onto the battlefield, which allows for things like a Turn 1 Blightsteel Colossus or God-Pharaoh's Statue or Bolas's Citadel, all of which are pretty close to unbeatable

On top of that, you included an Atraxa as an extra card and I actually already run an Atraxa deck

The absurd amount of card advantage that Necro offers, essentially allowing you to convert life into cards, makes it one of the strongest card-draw spells that has ever been made

Three counterspells, and suddenly you are actively digging toward whatever win condition your deck is built around, all while efficiently stopping your opponents dead in their tracks

But as you can see from this hypothetical schedule, such a change is doable