Surge of Wyvern Fire

Deal X damage to any number of creature and/or planeswalkers your opponent controls where X is
the power of target Wyvern you control.
Creatures your opponent controls get,"At the beginning of each step of each turn, deal 1 damage
to this creature
Planeswalkers your opponent controls get,"At the beginning of each step of each turn, this planeswalker loses 1 loyalty."