It's a staple in midrange and control sideboards, especially in metas full of degenerate combos or big mana nonsense
Howling Mine Howling Mine (and similar iterations like Dictate of Kruphix or Kami of the Crescent Moon) is central to whats known at Commander tables as group hug. In Commander lingo, thats cards that provide a benefit to one or several of your opponents
His final act of heroism was saving Liliana Vess after a weird series of plot twists, giving up his literal immortality just to save the life of someone who didnt even like him all that much
No matter what type of deck you run or what strategies you like to employ, sideboard cards can be broken down into a few specific categories
In addition, you can play multiple colors (imagine Invasion Block "domain" decks with this card to fetch off-color lands)
Weve also got an explainer on the six Ink colors from the game to help you choose what playstyle is right for you.