Blast 2: Mistletoe, Frozen, Mystery, Spring, Summer Blast 3: Heartbreaker, Pumpkin, Cloud, Stardust Plus some more I'm sure, here's just a few that have blast!
Incase anyone else has this question and comes across this post, i have made a catalogue of crate/event items and their enchants here: https://peacefulfarms.net/threads/event-item-catalogue.19543/ To answer this question specifically, here are all pickaxes that have blast:
