Thema, Arrow of Agnomakhos

Lifelink, siege (Whenever you attack an opponent
with creatures with total power 6 or greater, that player
becomes besieged until the end of your next turn.)
Whenever a besieged opponent casts a
noncreature spell, Thema, Arrow of Agnomakhos
deals 2 damage to that player.
Whenever a creature enters the battlefield under
an opponent's control, if that player is besieged,
Thema deals 2 damage to that creature.