Gen the Diamond Tiger (MP24-EN247) [25th Anniversary Tin: Dueling Mirrors]

Once per turn, at the end of the Battle Phase: Return this card from the field to the hand. You can only use each of the following effects of "Gen the Diamond Tiger" once per turn. During your Main Phase: You can Special Summon 1 "Ken the Warrior Dragon" from your hand or Deck to your opponent's field in Defense Position. If this card is Special Summoned by the effect of "Ken the Warrior Dragon": Discard 1 card.