Rokumonsen: You cannot discard this card.
Kesshi no Kakugo: Your attack rolls gain +1 and your attacks deal +1 damage. After you make an attack, add a counter to this card. When you place the sixth counter on this card, you lose the game.
The Sanada family crest is derived from a Buddhist story, describing why one should take six coins to go through hell. It warned all enemies that no Sanada feared death.