Marc Bartra said an emotional farewell to Borussia Dortmund after signing for Real Betis on a five-and-a-half-year contract.
The former Barcelona centre-back has returned to La Liga after an 18-month stint in Germany, during which time he made 49 appearances for Dortmund.
Bartra, 27, was severely injured on his hand and arm in the bombing of the Dortmund team bus in April 2017 ahead of the first leg of the Champions League quarterfinal with Monaco.
Bartra told the Bundesliga club's website: "I can hardly put into words the moments and feelings that I had in the last year and a half.
"I would never have thought it possible to receive that much love and support from one of the best football families in the world."
Bartra was in the team when Dortmund beat Eintracht Frankfurt 2-1 to lift the DFB Cup just over a month after the bombing.
He added: "I gave everything at every moment. We were able to get a cup again after a few years and celebrate the triumph together. I'll never forget that moment."
Spain international Bartra came through the youth ranks at Barca and joins a Betis side who are currently 13th in the La Liga table.