Not only does this help eliminate opponents faster, but it also saves you from needing to always attack to win
They are striking, creative and bring something different than the standard size cards
Even if the caster has a weak board, Ruinous Ultimatum is still worth casting if they can't wait for another, cheaper board wipe
On the 'enhance your army' side, Cactusfolk Sureshot gives your team trample and haste, Railway Brawler can double the numbers of every creature you play, and Silverback Elder turns every creature played into potential removal, life gain, or ramp
This card will give you sacrificing benefits, ramp, removal, ping opponents for 2 damage and draw you a card
As a rare its more difficult to figure out