Neville, Herbology Student

Magecraft-Whenever you cast or copy an instant
or sorcery spell, Neville Longbottom gains +1/+0
until end of turn.
When Neville Longbottom is casted create a 0/4
green token called Mimbulus Mimbletonia. It has
"Defender {t}: You gain 1 life. {2}, Sacrifice
Mimbulus Mimbletonia: Learn.
"It's really, really rare"