Consider cards like Mycosynth Wellspring or a cheeky Tormod's Crypt to surprise that Muldrotha, the Gravetide player
Whether this gives you a draw spell, removal, or even a piece of ramp, everything is welcome at the end of the day
You can see the very human eyes in the sunken skull -- which itself has a bunch of extra metallic parts
Sea Gate Restoration is the best of the bunch, as a land that can also be an extremely powerful card-draw spell in the late game
All of which are really powerful, and two of which increase her loyalty to keep her in the game! Okay Abe, I think Ive got it
(It attacks each combat if able and attacks a player other than you if able.) When Eye of Nidhogg is put into a graveyard from the battlefield, return it to its owner's hand