The Summoner

Instant and sorcery spells you cast cost {2} more
to cast.
Whenever you cast an instant or sorcery spell,
create a "Summoner's Mutant" creature token
whose color identity is the same as the spell cast
and with base power and toughness equal to the
converted mana cost of that spell minus 1.
{3}: Target creature gets +1/+1 until the end
of your next turn. Activate this ability only as a sorcery.