Nafs Asp (Light Mana Cost) [Arabian Nights] Onslaught and that player can't activate

and that player can't activate abilities that aren't mana abilities

each player may pay any amount of life

Set: Amonkhet Invocations Type: Instant Rarity: Mythic Cost: {U} Change the target of target spell with a single target unless that spell's controller pays {2}

Other Knight creatures you control get +1/+1 and have indestructible

he is a master of trickery and misdirection

Nafs Asp (Light Mana Cost) [Arabian Nights] Onslaught and that player can't activateSet: Arabian Nights Type: Creature Snake Rarity: Common Cost: {G} Whenever Nafs Asp deals damage to a player, that player loses 1 life at the beginning of their next draw step unless they pay {1} before that draw step.