Hive Shaper

Ward {2}
You cannot cast Hive Shaper. Hive Shaper is all
colors. Whenever one or more slivers you control attacks, you may put Hive Shaper onto the battlefield from your hand.
{1}: Target creature loses all creature types until
Hive Shaper leaves the battlefield.
{1}: Target creature becomes a sliver in addition
to its other types until Hive Shaper leaves the
battlefield.