Irina, Knights Angel

Defender
{w}: Regenerate all Knights you control.
{r}: Knights you control gain +2/+2 until end of turn.
{r}{r/w}: Irina, Knight's Angel loses defender and gains +5/+0 and First Strike until end of turn.
{w}{r/w}: Irina, Knight's Angel gains +0/+5, Hexproof, and cannot lose Defender until end of turn.