Rainbow Dash, Loyal Defender

Flying, Haste, Indestructible
{t}: Target opponent creates a 0/3 "Rainbow
Flash" token. Activate only during target
opponent's declare blockers step.
{2}: Untap this creature. Only opponents may activate this ability.
Rainbow Dash, Loyal Defender gets +3/+3 and
gains can't be blocked while your opponents
control six or more creatures with 0 power.