It's a pad of sticky notes!
The rules for the ability "+1/+2 card(s)" state, that this are "free" cards.
English rules, p 10 wrote:
+1 card: You can draw 1 additional fighting card for free (place it on the right side of the hazard card).
+2 cards: You can draw up to 2 additional fighting cards for free (place them on the right side of the
The "free draws" are placed on the left side of the hazard card. The +1/+2 cards are placed on the right side, but are not "free draws", they just don't cost anything.