Creature - Human Soldier Color tag templates(None) Merry, Warden of Isengard Partner with Pippin, Warden of Isengard (When this creature enters, target player may put Pippin into their hand from their library, then shuffle.) Whenever one or more artifacts you control enter, create a 1/1 white Soldier creature token with lifelink
I think adding ward 2 to expensive Commanders is the way forward in a format that encourages running a low curve, especially when your deck revolves around them
The best bit about this effect is that it only costs 1 XYZ material to activate, meaning you can reuse this effect, giving you two whole turns of protection from any graveyard shenanigans
Don't completely knock her combat ability though
A second strategy is based around the Graveyard, so Im guessing maybe Zombies
Repeat with the remaining cards and packs