The EHF Finals in Lisbon will mark his farewell from the club.
“Joining Löwen and one of the best leagues in the world is a logical step in my career,” he said.
Competing in the Bundesliga next season means he will get to play against Magdeburg several more times.
The German powerhouse are Nexe's semi-final opponents on Saturday, and both teams also met in the group phase earlier this season, when Magdeburg won 32:26 at home in December and 28:24 in Nasice in March.
Having won both encounters, Magdeburg are clear favourites in Altice Arena on Saturday.
“Magdeburg have defeated us two times already. It is not a big surprise, because if you ask me, they are one of the top three teams in the world right now. Their performance this season across all competitions shows that,” Jaganjac said.
Magdeburg haven’t lost a match in Europe’s second-tier competition this season, only drawing two times. The German side’s strong defence and powerful attack will prove a real challenge for Nexe.
“I think we have the small advantage of not being the favourites in this match. We can play without any pressure,” Jaganjac said.
“Magdeburg are strong on all positions. We have to over-perform and push our limits if we want to surprise them in Lisbon,” he added.
“The EHF Finals is a reward for our hard work in Nexe, for this amazing season. We just want to enjoy playing handball, no matter the outcome.”