Paladin Class (AFR-029) - Adventures in the Forgotten Realms Foil

(Gain the next level as a sorcery to add its ability.)
Spells your opponents cast during your turn cost {1} more to cast.
{2}: Level 2
Creatures you control get +1/+1.
{4}: Level 3
Whenever you attack, until end of turn, target attacking creature gets +1/+1 for each other attacking creature and gains double strike.