Initial Thoughts My initial thoughts are that this deck will experience very similar problems in variance like many other Prison style decks such as Stax, Mogg Stompy, Mono W Soldiers and the like
The activated ability is what helps push him over the edge
Nobody turns down free cards in EDH, and you should get the better end of the deal, especially if you reliably cast two spells a turn
Besides the obvious synergy with Toothy, Imaginary Friends +1/+1 counters and card draw, Pir can really increase the effectiveness of planeswalkers, oil counters, and vanishing creatures
Its unfortunately not that difficult to block, but if you can get safe attacks in, that value starts to add up
Furthermore, while this card might not be the most powerful, it showcases the innocence and sweetness of love