Good luck! failed summoner is not beefy enough on low level so it only really starts to get appreciated in higher leagues (or low mana battles/ little league ruleset). It's actually one of the most used cards in the high leagues after chicken of course :-)

It's true that a strong magic team sometimes still blasts through it, you need some beefy cards to take the initial damage and survive. or some healers. Void+magic reflect would be best of course!