Blackadder's men face a last-four clash with Stade on Sunday, but could be boosted by the return of lock Attwood who has been struggling with a knee problem.
Attwood hasn't played a minute in 2017, but is back in full training with Bath. He says he feels lucky to be in with a chance of being selected this weekend.
"I'm just thrilled to even be considered to play," said Attwood. "I haven't even thought about the magnitude of the game.
"It's been such a dark hole, I'm just excited about the potential opportunity to hit some live scrums and do some real rugby stuff.
"The reason I joined the club in 2011 was to get some silverware.
"I know a lot of other people looked at the infrastructure, the facilities, the coaching and the playing squad and thought this is a team that wants to win things and put themselves in a position to be successful."
Bath have had an impressive run to the Challenge Cup semi-finals, downing French opposition in the shape of Brive in the last-eight stage.
That 34-20 win over Brive on home turf saw the likes of Semesa Rokoduguni and Taulupe Faletau impress, and Bath undoubtedly have plenty of talent in their squad.
Bath haven't won silverware since 2008, but Attwood is determined to bring that run to an end.
Whoever wins in the French capital will face either La Rochelle or Gloucester Rugby in the Challenge Cup final at BT Murrayfield on May 2.
Attwood said: "The fact there's been such a drought weighs heavily on the squad and particularly me. It's something I'm very much hoping to relieve us of this year.
"The next challenge is a semi-final against a huge team, away from home, who are playing incredibly well, and a chance to get to a final up in Edinburgh.
"Given that we've taken ourselves out of the driving seat in the Premiership and are basically relying on results to qualify for play-off opportunities there, this next game is a massive one."
Attwood is in contention to start the game at the Stade Jean-Bouin.
Blackadder's big names including British Lions Faletau, Jonathan Joseph and Anthony Watson will lead the charge for victory alongside George Ford and Rokoduguni.
Stade will be anything but an easy test though and have the players capable of matching Bath's free-flowing style of play.
The Parisians secured an impressive away quarter-final win over Ospreys at Cardiff's Principality Stadium and in half-backs Will Genia and Jules Plisson and captain Sergio Parisse, have international experience at the spine of their team.
The battle between Ford and Plisson at fly-half has the potential to define the game.
Plisson said: "I know George Ford very well, I've played against him lots of times with England at Under-18, Under-19 and Under-20 level. He's a very good player.
"I really enjoy playing against him because he's top quality, but it will be very important for us to win that game for the public and all the people at Stade Francais."
Australian livewire Genia said: "Bath will be a very tough test, they are a quality side when they have all their players back and playing for them. Ford is coming back, so it will be a very tough test for us."
- Stade Francais have reached the Challenge Cup semi-finals for the fifth time. Their previous four semi-finals have all been decided by margins of fewer than seven points (W2, L2).
- Bath, the 2008 winners, are through to the semi-finals for the sixth time and they have progressed to the final on four of five previous occasions.
- Stade's four previous games at this stage were all against Top 14 clubs whilst four of Bath's previous five semi-final ties have been against Aviva Premiership opposition - the exception being their two-leg aggregate defeat to Montferrand (now ASM Clermont Auvergne) in 2004.
- Bath have won 16 of their last 17 away games in the Challenge Cup with their only defeat in that run coming earlier this season against the Cardiff Blues.
- Bath have won their last six games away to Top 14 sides, however, all but one of those games were decided by fewer than 10 points.
- Stade Francais have won seven of their last eight home games against Premiership opposition in the Challenge Cup. Their only defeat in that run came against Harlequins in the 2014 quarter-final.
- Bath have scored the most tries (10) this season after gaining possession from a turnover.
- Bath need just eight points to score their 2000th in the Challenge Cup. They would become the 11th club to reach that total, with Stade Francais one of the 10 clubs to have previously reached the milestone.
- Semesa Rokoduguni has beaten 27 defenders in five games and his average of 5.4 defenders beaten per game is the best of any player to have made more than one appearance this season.