Forcing a creature to attack lets you essentially kill it for free, assuming you have a larger creature to block with
There are 4 rare (4.9%) and 2 mythic rare (less than 1%) scene cards that can appear in this slot
Any counters that were on it cease to exist
The effect of "King's Knight" then activates, letting Yami Yugi Special Summon "Jack's Knight" (1900/1000) from his Deck in Attack Position (Yami Yugi's Deck: 35 34)
BT15-099 C Option Venom Infusion Color Purple Cost 6 Card Text 1 [Effect] [Main] By trashing 1 Digimon card in your hand, delete 1 of your opponent's Digimon whose level is less than or equal to the trashed card's level
No, not because of Damping Sphere -- nobody but Seth would run that -- but more the fact that any non-green deck is going to be running lots of mana rocks by necessity, so blowing them up can really slow them down, which means they'll be slower to respond to your combo turn