The Blue Spirit The Blue Spirit is an excellent flash enabler, and putting creatures into play during combat is already cool, but drawing a card off of it is so much sweeter
, , Sacrifice a Servo: Create a 1/1 colorless Thopter artifact creature token with flying
Taeko, the Patient Avalanche Taeko, the Patient Avalanche has a great ability to make any of your creatures unblockable, except it must also attack
This is the most basic way to get free cards, and it will remain a staple of the game for the foreseeable future
Aberrant Aberrant is one of the most expensive ravenous cards in the sense that you want to cast it for a big chunk
It should be noted that this shouldn't be the first port of call, but it is an effective method of gaining further packs regardless