There are some decks that rely entirely on Threaten effects to function, such as certain builds of Hofri Ghostforge, The Beast, Deathless Prince, or Obeka, Brute Chronologist, but stealing things shouldnt be limited to just themed builds
Starting out as turn-based RPGs, the main series switched to first person, more action oriented role playing with Bethesdas Fallout 3 back in 2008 and has remained in the same style, even for MMORPG Fallout 76, ever since
Sarkhans Unsealing is a card that will probably trigger for almost every single creature in your deck, allowing you to deal tons of damage to opposing creatures, planeswalkers, and even opponents themselves
However, if you are the Monarch you can deal a lot of damage with awide board, and with the recent focus on non-creature damage, it is a very relevant ability for some interesting bonuses with other cards
Dont underestimate how much power these things can offer, or the fact Cranial Plating attaches at instant speed using the double black ability a handy way to make a fearsome blocker
Because its threats are so resilient, any deck attempting to play anything that resembles fair Magic with it will often be overpowered and overrun