Thorin, Arcane Ally

When you cast an instant or sorcery,untap Thorin.
{1}{r}{t}:Thorin deals 2 damage to target creature. Discard a card then draw a card.
{1}{u}{t}:Tap target creature, put a stun counter on
it. Draw a card then discard a card.
{2}{r}{t}:Thorin deals 4 damage to target player or planeswalker.
{2}{u}{t}: Controller of target tapped creature puts
it on the bottom or top of their library.
Draw a card.