If you put enough low cost Humans into your deck Kyler, and thus all of your Humans, can get very strong, very quickly
Keep your eyes open and your mind working
Because it exiles itself during resolution, we cant do the same kind of things we might in looping Living Death
Individually these effects are marginal: but combined they form a card that was so good, many non-red blue base decks started playing red just to get it (plus Flametongue Kavu, to be perfectly fair)
If the target creature's power is no longer less than the attacking creature's power as the ability resolves, mentor doesn't add a +1/+1 counter
While The Scarab God got played but rarely did much in game, it caused me return to that question of how I would build with this god in Commander