Castleford Tigers Head Coach has named the 19-man squad to face Hull KR in the First Utility Super League at The Mend-A-Hose Jungle on Sunday, kick-off 3:30pm.
There are two changes, with Michael Channing and James Clare replacing Jake Webster and the suspended Justin Carney.
"This will be another big challenge for us," Powell said.
"They will see this match as a must win for them in terms of getting in the top eight and that's something that we're finding at the moment; last week against Widnes they really came after us.
"We're going to get the same again as Hull KR will come after us and they have good players in all positions. Ben Cockayne is playing outstandingly well at full back with his kick returns and nullifying that threat is going to be important for us.
"We recognise that it's going to be a tough challenge, but as we have done in every game this year, we've got to prepare ourselves in the right way and hopefully we can deliver a performance that we can be little bit more proud of than the one we delivered last week against Widnes."
With Justin Carney sitting out the first of a two-match suspension, Powell said he is well stocked in replacement options.
"James Clare has been good whenever he's played this year so he's available to slot in, but we have some other options as well.
"Clare is the next cab of the rank and he's certainly worked hard in the time that he's not been playing.
"I'm confident that he will come in and do a good job; he's got loads of speed and skill and he's a pretty strong kid as well."
Castleford Tigers 19-man squad v Hull KR
1. Jordan Tansey
2. Kirk Dixon
3. Michael Shenton
6. Luke Dorn
7. Marc Sneyd
8. Andy Lynch
9. Adam Milner
10. Craig Huby
11. Grant Millington
12. Weller Hauraki
14. Daryl Clark
16. Oliver Holmes
18. Frankie Mariano
19. Scott Wheeldon
20. Jamie Ellis
23. Michael Channing
24. James Clare
26. Liam Finn
32. Lee Jewitt
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