Sir Bedivere of Silver Arm

When Sir Bedivere of the Silver Arm enters the battlefield, create an artifact named Airgetlam that says,"{t}{w} Pay 3 life, Airgetlam deals X damage to target player or creature, where X is Sir Bedivere of the Silver Arm's toughness."
{t}{w}{u} Scry 1, then draw a card
{t}{u}{g} Put a +1/+1 counter on target knight.