Professor's Letter is card #146a of 162 in BREAKthrough (2015), a Uncommon illustrated by Yoshinobu Saito. In a BREAKthrough booster it turns up about once every 15 packs.


















See the full BREAKthrough card list
It is a Uncommon, and it shows up about once every 15 BREAKthrough packs.
Yoshinobu Saito drew the art for this card.
Yes, as a digital simulator. Holobrook lets you open BREAKthrough booster packs in your browser with the set's real pull rates and keep what you pull in a digital binder. No real cards, nothing to buy.