Whenever you cast a Myr spell, create a 1/1 colorless Myr artifact creature token. At the beginning of combat on your turn, untap each Myr you control. {W}{U}{B}{R}{G}, {T}: Put three +1/+1 counters on each Myr you control. Activate only during your turn.

Flying {2}: This creature gets +1/+0 until end of turn. {X}: Destroy each nonland permanent with mana value X whose controller was dealt combat damage by this creature this turn. Activate only once each turn.