Ancient Warriors Saga - East-by-South Winds

You must send this card to the GY during your 2nd Standby Phase after activation. Once per turn, during your Main Phase: Toss a coin and if the result is heads, send this card to the GY. If this card is sent from the Spell & Trap Zone to the GY: You can activate this effect; this turn, your opponent cannot activate cards or effects in response to the activation of your "Ancient Warriors" cards and effects, also until the end of the turn, all "Ancient Warriors" Effect Monsters you currently control gain this effect.
● When this card declares an attack: You can destroy 1 card your opponent controls.