The Warring Triad* A very interesting take on a 3 mana rock that helps you advance your general gameplan until Kefka gets in the way (represented by 8 or more cards in the graveyard) and then it unleashes plenty of power
For example, an Enchanted alternate art version of Elsa, Spirit of Winter sold for $45,000 on eBay in 2023
That ability lets you cut way down on the cost of your manabase, running bulk tap lands like Tangled Islet as full-on duals
// Vigilance On turns where the effect of Summon: Yojimbo's second or third chapter ability is applying, your opponents can choose not to attack with a creature that must attack if able as long as there is no other player, planeswalker, or battle for that creature to attack that wouldn't require a cost
Oath of Eorl I don't love the delayed monarch trigger on Oath of Eorl, as it gives your opponents a few turns to dig for a Reclamation Sage or another answer, but I do appreciate how well it protects itself