I'm having a blast researching all the neat things Mairsil can do, all the zany brews people are coming up with, all the jank obscure cards that suddenly may see some play due to this guy's weird ability
Do you focus on the sacrificing aspect that he utilized frequently
(When a creature with undying dies, if it had no +1/+1 counters on it, return it to the battlefield under its owner's control with a +1/+1 counter on it.) Whenever a Human deals damage to you, destroy it
On top of these classic Tolkien characters making their Magic debut, scenes from the books (and movies too) have become exceptional cards compelling fans to march to Mordor to grab them
10E #94 #91 Commander, Legacy, Modern, Pauper, Vintage Alchemy, Brawl, Competitive Brawl, Historic, Pioneer, Standard, Timeless
So, in order to maximize that, you'd drop lands and cards from your library first, and then your hand second