Black Knight [Beta Edition] XY04 Whenever Kalonian Hydra attacks

Whenever Kalonian Hydra attacks

Randomly select and discard 1 card from your opponent''s hand

including a LIGHT monster (This card is always treated as a "Familiar-Possessed" card

All monsters you currently control gain 300 ATK for each Level 5 or higher monster you control

if this card

Black Knight [Beta Edition] XY04 Whenever Kalonian Hydra attacksSet: Beta Edition Type: Creature Human Knight Rarity: Uncommon Cost: {B}{B} First strike (This creature deals combat damage before creatures without first strike.) Protection from white (This creature can't be blocked, targeted, dealt damage, or enchanted by anything white.) Battle doesn't need a purpose; the battle is its own purpose. You don't ask why a plague spreads or a field burns. Don't ask why I fight.