While the deck wasn't especially fast, it did generate an absurd amount of value in the late game, with Emeria, the Sky Ruin to reanimate creatures with enters-the-battlefield triggers and Panharmonicon to double up those triggers
Drawing cards is good and if you have an abundance of Floodborn characters in your deck, Blue Fairy can draw you a bunch of cards
It depends on the ability and if the creature has summoning sickness
The other part of the card is of course that the player you damage discards a card
Spook9MM on Combining effects from 2 cards 6 years ago So I have Pyromancer's Goggles in play, as well as Primal Wellspring
Its a very important aggro card, and not only saw a lot of play in Standard, particularly in Arena BO1, but also had a good showing in Pioneer in the early days of that format