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League community is worse, but depends on your server.

No denying
Press B to back, Teleport is a summoner spell
Summoner Spells are long CDs, but not specific to champions or items. Flash is the best at around lvl 12 and is 1/3 range of Blink Dagger.
Generally can only jungle with summoner spell Smite
Warding is important, Supports generally do most of it, but everyone can pitch in to buy control wards to help