Jasper, Callous Quartz (Borderless)

First strike, haste Exalted (Whenever a creature you control attacks alone, it gets +1/+1 until end of turn.) Other Gems and Soldiers you control have exalted. Whenever a Gem or Soldier you control attacks alone, untap it. Then, if it’s the first combat phase of the turn, there is an additional combat phase after this one.