Battle-Mech Knight

Once per turn: You can equip 1 "Battle-Mech"
creature from your hand or discard pile to this
card.
If an Upgrade card(s) is sent to the discard pile
while equipped to this card, you can play 1
"Battle-Mech" creature from your deck. You
can only activate this effect of "Battle-Mech
Knight" once per turn.