:When this unit is placed on or put on , COST [retire one or more of your other back row rear-guards], and this unit gets +5000/[Shield]+5000 until end of turn for each unit retired for this cost. If you retired two or more units for this cost, COST [put two normal units with "Musketeer" in their card names from your drop on the bottom of your deck in any order], and draw a card.
It's because there are limits, that it can bloom beautifully.