HMS. Javelin, Energized Idol

Haste, vigilance
When HMS. Javelin, Energized Idol attacks,
untap two creatures you control, they gain
haste and vigilance until the beginning of the
next end step.
{2}{g/u}, Reveal HMS. Javelin, Energized Idol
from your hand: untap a creature you control.
Activate this ability only once each turn.