Mechanics for an evasive assassin
It'd be interesting to create an assassin that could be in the middle of a big fight and still be evasive. Maybe he'd be all about running up and auto-attacking you, but all his abilities made him super slippery? Or maybe his abilities would be offensive on enemies, but evasive on allies?
How about the ability to make nearby teammates block projectiles aimed at you, like Braums shield does? For example, a passive that always lets you hide behind your allies' hitboxes, or an active that moves you behind an ally and makes them soak up projectiles for a few seconds (an inverse version of Braum's W-E, essentially).
How about a block ability that also knocks you away from your attacker? A block that teleports you up to the damage source? Maybe a spell-shield that makes you enter stealth for X seconds if someone pops it?
How about LB's Distortion, but you are always teleported back after X seconds? Maybe it forces you to teleport back and forth several times, giving you a few seconds to attack each time you go in, and a few seconds to move your "mark" when you go back?
How about a reverse-Rengar; each time you attack in melee you leap back, only allowing you to land one **hard **hit each time you engage, but also making you leap to safety each time?
Do you have any ideas for evasive assassin-type abilities?
