As is, Spellbender is a really cool secret but one thing about it seems out-of-place.
If a Druid casts Wrath or a Priest casts Power World: Shield and a Spellbender takes it... the casting player of the spell (Druid or Priest) still gets to draw a card. I think it is the Mage who should get to draw a card, or at the very least the spell's caster should not get one.
Either way I feel at least *one* out of the 6 Mage secrets should have some sort of card-drawing or better minion-summoning synergy. Maybe the Spellbender could be 2/2 instead. Anyhow, thanks for reading.