Riverland Hypnotist

Linger (Whenever you cast an instant or sorcery
spell, you may pay {2} and exile this card from
your graveyard to add the bracketed phrase to
that spell.)
Flying
Creatures with trance counters on them have
hexproof and +0/+1.
{4}{u}{u}, {t}: [Put a trance counter on target
creature.] You control that creature.