Medium Battlefield Machine

Only 3 Soldiers can be attached to this mechanism.
No Rogues can be attached to this mechanism.
Heavy, medium, and light war machines power
and toughness are equal to the number of
soldiers and Commanders attached to it.
Whenever an opponent deals combat damage of
3 or more to you or destroys a soldier you control
with toughness 2 or less, search you library for a
rogue creature, reveal it and put it into you hand.
Then shuffle you library.