Khagan, Smoldering Striker

Counter - Play: You may play this card when an opponent plays a Clash card. If you play this card using this effect, send it to Oblivion at the end of turn.
Trigger - Enter: If you played this card during an opponents' turn, this card gets +1/+0 until end of turn. Then choose target Clash card an opponent controls. Until end of turn, other Clash cards that opponent controls cannot attack until target Clash card attacks