Hi there! If im not mistaken, there's also a Level3 Rune Pack together with the Time Limited Summoning Scrolls..

And for the author of this thread, Use your summoning scrolls when you needed it, the "Draw10 summoning scroll" monthly event occurs twice every month, every week2 and week4 of the month.. but the summon rebate is only every week2.. If you just want to accomplish monthly event, then use 20 every week that have the "draw10 summoning scroll" event.. but if you feel to grab and get a new yellow summon or have a lot of summoning rune, then use your scrolls every week2 of the month so that, you can have the rebate and earn more summoning scrolls that you c*e for additional chance of getting a new summon, plus you c*so get a rune packs ..