Spider mage

( {p/b} Can be paid with {b} or 2 life.)
Lifelink
When spider mage enters the battlefield summon
a 2/4 spider token creature or gain haste.
Dash {2}{p/b}{p/b} (You may pay this spell for its dash
cost. If you do, it gains haste and it is returned
from the battlefield to the owner's hand at the
beginning of the next end step.)