This card will likely remain the holy grail of Houndour cards for the foreseeable future
Instant One or two target creatures each gain haste until end of turn
These are cards that will always help you out in a pinch, give you control of the board, help you go through your deck faster so you can get the cards you want, etc
In each booster, you will open 2 rare cards, 1 of them being a rare mythical, and 2 traditional metallic terrain cards
If you really want to take advantage of Sin and flood the board with more permanents than you know what to do with, you want to incorporate token doublers
These are most often creatures or enchantments, but occasionally show up in other forms