Heart of the Swarm

Escalate {u} (Pay this cost for each mode chosen
beyond the first.)
Choose one or more —
• Search your library for a structure card with
converted mana cost 4 or less, reveal it, put it
into your hand, then shuffle your library.
• Create a 0/1 Larva creature tokens with "At the
beginning of your next upkeep, sacrifice this
creature and create a 1/1 Drone creature token
with "{x}, {t}: Untap target structure with
converted mana cost X."