Reina, Dragon Slayer

First strike, Menace, hexproof
The first time Reina deals damage to a creature
each turn, that damage is doubled.
When Reina damages a creature, prevent all
damage dealt to Reina by that creature until the
end of turn.
{4}: Reina deals 2 damage to target creature. If
the creature has flying, this deals 6 damage
instead.