Kiwur the Flightless

Whenever a creature with flying would block
Kiwur the Flightless, he gets +2/+0 until end of
turn.
{u}, Tap another creature you control that shares a creature type with Kiwur the Flightless: He gains flying until end of turn.
Whenever a creature attacks you, if it has flying,
it loses flying.
"Don't use our tricks against us."