New Units:

To start things off, we have Ragnar Blackmane. At first glance, he may not seem too impressive - a walking T4 character with a 3+ armor isn't exactly hard to kill - but you are missing the point. Ragnar is a brutal character with incredible close combat potential. In fact, he makes the rest of the new primaris marine characters (Khan, Ferrios, Marneus, etc) look like utter chumps.

Why? Well, this is because of a combination of his new rules and his new stratagems. First of all, Ragnar is cheap - 120 points is CHUMP change as far as his points go, and if you get him into combat, there is highly unlikely he will not be able to get his points back. He is a force multiplier with his ability to reroll charges, and the aura he emits which allows Space Wolves units near him to consolidate 6" is no joke because, as the ladies always know, an extra 3" is a lot. Much like other captains, he also allows for rerolls of 1.

What makes Ragnar so devastating is his close combat potential. He has an incredible 10 (!) attacks on the charge at AP -4 and Str 6 with 2 Dmg a pop. This will smoke most things. Primaris marines? Dead. Ork boys? Dead. Centurions? Dead. In fact, the only thing Ragnar DOESN'T do well against is stuff with high toughness (>7) and an invul save. This is limited to certain vehicles and characters, but that list is short. Expect to see him in a LOT of Space Wolves lists.

Next up, we have the Wolf Priests, the Space Wolves version of the Chaplain. They are similar in many ways to the other Space Marine chaplains, with a few notable exceptions. First, they also serve as the Apothecaries of the chapter, allowing a 6+++ along with some resurrection abilities. This is icing on the cake because, as we all know, Litanies are already incredibly useful. Most crucially for the Space Wolves is the Canticle of Hate. The issue with Space Wolves has ALWAYS been delivery - getting them into close combat has been their main limitation. The extra 2" allotted from this litany is huge for this army and makes outflanking via stratagems much more palatable with a 7" (often-re-rollable) charge. In addition, the Space Wolves also got their chapter-specific litany with a long name. In short, it adds 1 dmg to your CC weapons against a monster or vehicle unit. Useful, but not ground-breaking. All priests know it by default, so it's nothing but a plus.

Finally, SW got access to all of the other primaris units the other chapters had access to. A few, in particular, are nice for the Space Wolves army. Invictor Warsuits are a nice addition that allows the Space Wolves to start right in your face turn 1, which is exactly where they want to be. This is only further augmented by the new ITC rules, which allow you to KNOW if you are going first or second before deployment. That makes the Warsuits even better because you aren't in danger of getting seized on. The other notable unit is Impulsors. Again, delivery has been an issue for Space Wolves previously, and this makes the delivery of units like Ragnar more palatable.