Meren enables lots of cool stuff, from self-mill to reanimation to counter proliferation to a classic aristocrats shell that generates basic value from sacrificing and reanimating creatures
In terms of upgrades, consider these: If your opponents rely heavily on their commander, try using Hinder and Spell Crumple Steal creatures with style
We'll do that here, too, but when it comes to both, the very specific art, treatments, and availability of these cards means they aren't so much "true" reprints as they are special editions of existing cards
He draws, ramps, and combos off like a monster
Pairing it with Zealous Conscript creates an infinitely large army of 3/3 creatures with haste, pairing it with Worldgorger Dragon gives you infinite mana and infinite enter-the-battlefield triggers, and pairing him with Combat Celebrant gives you infinite combat phases
(8/7/2020) The number of times a player has cast their commander from the command zone resets to zero