Its honestly very playable straight out of the box if youre looking for an easier option or want a basis to build around if you only have Wilhelt, but since its a Zombie Typal deck, theres plenty of Dimir options for us to improve it even more
For someone to initially take the Initiative, someone has to play a card that grants it
The ability allows you to use a single burn spell against one creature and then have it branch off into others similar to how a chain of lightning might spread between creatures close together
Then came Kaldheim, which had strong, knotwork edging reminiscent of wood block prints
Slimefoot and Squee I didnt count Slimefoot and Squee as a Squee card, because if I had it would clearly have been the best one
However, with the invention of infect in Scars of Mirrodin block, poison counters grew in reliability as something like Skithiryx would kill in three hits, and was a much bigger threat as a result