Its fast and consistent, and thats a necessity in the current meta
Its pretty hard to keep track of all the different cards that exist in all the various types of boosters, bonus sheets, and cards from The List only appear within set boosters, not collector boosters
Wood Elemental gets bigger as you sacrifice untapped Forests when cast meaning you have to have at least five mana available to keep Wood Elemental alive as a 1/1 creature when it enters the battlefield
When an expansion goes out of print (is no longer reprinted)
Removing five defense counters from Invasion of Tarkir exiles it, enabling you to cast it transformed into a 4/4 Dragon with flying, trample, and an ability that deals two damage to any target whenever a Dragon you control attacks
Thats a very quick way to take people out, and will also upset 100% of your friends every time