Change of heart, Uncommon 0-cost
Replace selected card in hand with matching card
Lose cost of replaced card
Discard matching card of selected card(can't draw rare)
"Discard matching card of selected card(can't draw rare)" seems unnecessarily wordy to me. I think we could get away with "Discard opponent's card (can't draw rare)" or "Discard opponent's copy (can't draw rare)" and the effect will be clear. Or alternately "Discard selected card's match (can't draw rare)" to eliminate the "of" and the multiple uses of the word "card."