Syr Hallyth Tomeseeker

First strike, haste
Prowess
Magecraft—Whenever you cast or copy an
instant or sorcery spell, you may pay {2}. If you
do, create a token that's copy of Syr Hallyth
Tomeseeker, except it isn't legendary. It must
attack this combat if able. Sacrifice it at the
beginning of the next end step.