Tetran B.E.S. EEN-FR017

Place 3 counters on this card when you Normal Summon it. This card is not destroyed at the end of a battle. If this card battles a monster, remove 1 counter from this card at the end of the Damage Step. If this card battles without a counter, destroy this card at the end of the Damage Step. Additionally, by removing 1 counter from this card, destroy 1 Spell or Trap Card on the field. You can only use this effect once per turn.