1st: it's returning you card to your hand. Which mean your card is stunned for at least 1-2 turns (depend on if you have a charge card)
2nd: By returning the card to your hand you are forced to pay the mana price for minion again.
3rd: By returning the card to your hand it also removes all buffs on the minion.
The way a sap should work, should only be stunning the minion for a few turns and not drain your mana and remove buffs too. And all this is only for 2 mana.
This is pretty anoying for me as a priest since I now have lots of time lost blockers with life buffs so they had 10-20 hp to this.
This is my opinion and I feel it should be changed to either cost more mana or only stun the minion for 2-3 turns. What is your opinion?