This card is unaffected by your opponent's Spell effects. During your next Standby Phase after this card inflicts battle damage to your opponent by a direct attack: You can send this face-up card to the Graveyard; Special Summon 1 "Silent Swordsman LV7" from your hand or Deck.
You can special summon Silent Swordsman LV5 from your deck with the effect of Silent Swordsman LV3, or you can use Level Up on Silent Swordsman LV3 to quicken the process and special summon him immediately.
You can activate Silent Sword Slash to make Silent Swordsman immune to all your opponent’s card effects while also increasing his attack. You can then banish Silent Sword Slash from your graveyard to search out a Silent Swordsman monster from your deck. Use Level Modulation to revive Silent Swordsman LV5.
Use Shooting Star Bow - Ceal to attack your opponent directly and special summon Silent Swordsman LV7. You can also combo Reverse trap to this so that instead of losing 1000 attack, you gain 1000 attack.
Sends from field to Graveyard for cost
Unaffected by the opponent's Spell Cards
Special Summons from your hand / Special Summons from your Deck
is he Affected by spell cards that have already been played before he came on the field?
No, he is not affected by any spell card. Let us say your opponent has wonder ballons with 2 counters on it, when you summon silent swordsman Lv 5 it will have its original attack even if you opponent adds another counter to wonder ballons in its next turn.
He is also immune to monster effects for some reason. Couldnt destroy it w/ Snowman