Rakduk, Spire of Extinction

X is equal to goblin permanents you control.
Whenever you cast a goblin spell, scry X, draw
a card (look at the top X cards of you library you
may put any amount in the top or bottom of your
library.)
Whenever an opponent casts a nongoblin
permanent add {1} to your mana pool, use this
only to cast goblin spells.