Unfortunately, the first 5 matches I got today where all less than 20 mana-cost battles. 3 of which are even 12-16 mana cost matches so I was clearly at the disadvantage. Still, I still tried using the Dragon splinter and failed 5 TIMES. XD

There are waaaaaay too many low mana battles lately. It's really aggravating if you've invested in high mana summoners.