Jekkrus Scout

When Jekkrus Scout enters the battlefield,
reforge 4 (You may exile another permanent you
control. If you do, reveal the top 4 cards of your
library and put a permanent card with equal or lesser
mana value than the exiled card onto the battlefield.
Put the other revealed cards at the bottom of your
library in any order.)
Whenever an artifact enters the battlefield under
your control, Jekkrus Scout gets +1/+0 and haste
until end of turn.