The flavor of the card is that the enchanted creature is becoming a werewolf, but eventually daylight will come and the creature will turn back
Three opponents each casting a single spell won't work, for example
Then, after the dust has settled, Fiend Artisan gets swole from all the creatures that have been sacrificed or removed across the game
And it can sometimes be a powerful 2-for-1 thanks to fuse
If youre interested in making a dual-tribal deck with the bloodsuckers and shambling corpses working alongside each other, Kalitas should definitely be at the top of your list
The core cards are almost always: 4x Counterspell 4x Swords to Plowshares 23x Wrath of God The rest of the list is often heavily debated among players, since the metagame evolves more than people might expect, sometimes even from one tournament to the next, depending on what wins and what becomes popular