The Move cost is the symbol on the left, and the Lore icon on the right is slightly different from the standard one
Giving your other characters Resist +2 during the challenge can allow them to hit without taking as much damage themselves
In the late game, when youve already got plenty of creatures, it helps finish the game by making your entire team larger and giving them vigilance so you can freely attack without worrying about dying on the crackback
The most impactful card is probably Exterminio, which would translate literally to Extermination but probably references to Overkill, the mechanic from Final Fantasy X, . Exterminio is a black instant removal spell with an interesting twist: setting a creature's health to -9999 plays around indestructible
So, a quick analysis: for 1 mana, you can put this card into play, and it can be tapped to gain CC (two colorless mana)