On the surface, the general goal of the deck is to take advantage of the Dredge mechanic on cards such as Stinkweed Imp and Life from the Loam
The card has a the "Extra Battle Day" logo on the lower right hand side of the card (in Japanese)
Luckily there are ways to manufacture charge counters, including cards like Coretapper, Power Conduit, and Surge Node
Barrage Tyrants ability would be decent as a response to removal if the cost was cheaper or if it wasnt so fragile
Sword of Feast and Famine is largely considered one of the best swords due to its untap-effect, and when you're running a snow-deck, Jorn essentially has that ability built right in
So you cannot use one creature to pay for multiple sacrifice costs at the same time, nor can you play an instant that your opponent has already forced you to discard to still gain its effect