Teostra

Fly, Menace
{1}{r} : Targetted creature is dealt 3 damages next
time it untaps unless its controller taps it untill
next turn's End Phase.
{r}{r}{r}{r}{r}, {t} : Teostra deals 6 damages to all creatures. You may also tap Lunastra. If you do,
it deals 10 damages to all creatures instead.