Thea, Lightcaller

Whenever a creature you control attacks or
Thea, Lightcaller blocks, choose one that
hasn't been chosen this turn —
• Target creature gains +2/+2 and trample
• Thea, Lightcaller deals damage equal to
her power to up to three target creatures.
• If Thea, Lightcaller is blocked, prevent all damage that would be dealt to them.