Alexandria, Clan Crafter

Alexandria enters the battlefield with X+1/+1 counters, with X equal to 1 plus the greatest mana value among artifacts you control.
{u/r}{w/b}{t}, Sacrifice an artifact you control: Put a number of +1/+1 counters on target creature equal to the artifact's mana value.
{x}: Create an X/X colorless Construct token with power and toughness equal to Alexandria's power.