Jett, Agile Duelist

Flash
{2}: Tap up to three target creatures. They do not
untap during their controllers next untap step.
{t}: Jett, Agile Duelist gains haste until the end
of your turn.
{3}: Untap Jett, Agile Duelist. You can activate
this ability at any time.
Sacrifice 7 permanents: Deal 3 damage to up to 7 creatures.