Ivern's Bushmaker
There is one aspect of this ability that I actually fear will be underutilized
He is able to place bushes up to 1650 units away from him.
Lets just look at the fact that

(yes I know these are all the same) allow for ward placement of 1100 units. The only thing that tops this is
which is 7150 unit range.
Granted, these provide vision for at least 150 seconds, opposed to only 3 seconds, but he is able to stack up to 3 charges with a recharge time of 40 / 36 / 32 / 28 / 24 seconds based on rank.
can only stack up to 2 times and recharge at no less than 90 seconds at level 18. I also believe that his recharge time is effected by CDR, meaning with 45% CDR he can gain charges every 22 / 19.8 / 17.6 / 15.4 / 13.2 seconds.
Uses So how can this be best utilized? Should Ivern be played as a ward bot support in the bottom lane? No, probably not. His bushes don't grant vision long enough to justify spamming them everywhere. However, the range should be sufficient enough that you can grow a bush in the usual gank spots when you notice that your enemy laners are posturing in a way that might suggest a gank is coming. This could give you enough vision and warning to get yourself and your ADC out safely.
I have a better idea of how to use these. Ivern doesn't have the best dueling ability. He will also get himself dangerously low if he is going for an aggressive early clear. Enemy Junglers will be aware of this and may try to invade/counter jungle him. However, these little bushes can be tossed out to get a quick peek around blind spots for safety.
On the flip side, Ivern is great at invading/counter jungling. He can toss these out in a similar way as he is entering the jungle to gain some confidence that he is not about to walk himself into a world of hurt.
Ivern is still pretty new, and I know that a large number of people have not even played him yet, and even a large number of those who have, have not mastered him. This may be a concept that people have realized already, but my goal was to point this out to those who have not.