Teshin, Wandering Exile

Partner
Split Enchantment - Whenever you cast an enchantment spell that targets one opponent,
you may pay {x}, where X is the spell's cost.
If you do, you may choose an additional target
for the spell.
{r}{r}{t}, Sacrifice an enchantment you control.
Deal damage to any target equal to its cost.
If this is the third time you activate this ability,
exile Teshin, Wandering Exile, then return him
under your control transformed.