Yosen Training Grounds (THSF-EN008) [The Secret Forces]

Each time a "Yosenju" monster(s) is Normal or Special Summoned, place 1 Yosen Counter on this card. You can remove any number of Yosen Counters from this card; apply this effect, depending on the number of Yosen Counters removed. You can only use this effect of "Yosen Training Grounds" once per turn.
<br><b>-</b> 1 Counter: All "Yosenju" monsters you currently control gain 300 ATK until the end of this turn (even if this card leaves the field).
<br><b>-</b> 3 Counters: Add 1 "Yosenju" card from your Deck or Graveyard to your hand.