Ivan, ballistic Buccaneer

Prowess
{2}{u}: Roll a D20
1-7 Unlucky- Ivan, ballistic Buccaneer's power and toughness decreases/increases to it's base power and toughness until end of turn.
8-16 Lucky?- Ivan gets -2/-0 and gains first strike until end of turn.
17-20 Lucky!- Put a +1/+1 counter on Ivan, ballistic Buccaneer, then he gains double strike until end of turn.