If this creature dies before a turn's end step (for example, during combat), it will be returned to its owner's hand at the beginning of that turn's end step
Of course, for two mana you get an extra turn but Alpha this set aint
The casting cost, the flavor text, the mechanics they all riff off of Nivs endless Curiosity (which to be clear synergizes incredibly with the first two versions of Niv, and is a straight up combo with Niv-Mizzet, Parun)
On the top end, 3 points of damage is fine, but that discard ability can wreck an opponents plans and end the game immediately
Competitive deck builds, on the other hand, typically include more Trainer cards than anything else