New Summoner Spell?

Over the past couple days, I've been getting ideas of summoner spells that could possibly hold legitimacy in League of Legends. Maybe something along the lines of a spell that made you become untargetable for less than a second, or maybe invisible instead. Just another skill based spell that may be able to act as a substitute to flash, seeing as well over 90% of games are played with flash on average.

What are your thoughts? Any ideas of your own you'd like to share?

MYNAME'SBARRYALLENANDI'MTHEFASTESTMANALIVE