Batman, The Dark Knight

Flash, Vigilance, First Strike
Whenever Batman, The Dark Knight enters the battlefield, create X colorless artifact tokens called "Batterangs" with, "{t} Sacrifice this artifact: It
deals 1 damage to any target." Where {x} is equal
to the number of mana spent to cast this spell.
Whenever Batman, The Dark Knight attacks or blocks, investigate.
{2}{t}: Create a copy of target artifact token you
control.