Those Mandrake wards look like they'll be awesome
on the PBE, there are Mandrake Wards (temporarily bugged and causing crashes) that are invisible, do NOT provide vision, but ping the map if an enemy walks in range of them, even if that enemy is invisible.
I suspect this may be an early change to allow Riot more freedom in de-nerfing stealth champions COUGHEVELYNNCOUGH.
In any event they sound cool. I hope they're super cheap and long duration. I would love to light up the enemy jungle like a christmas tree at the start of the game while playing Evelynn and just wait for them to find me.
Heck, I'd start longsword, mandrake wards, and stealth wards and start ganking the enemy jungler at their starting camp.