Roschard the Tower
Roschard the Tower is a the original block Damage Champion with the unique ability to apply the buff for 2 turns. Below are the comps currently found that include Roshcard.
The Dark Knight – aka, WarCrusher
Using Renegade and Warcaster/Skullcrusher to stay unkillable. Affinity can be difficult to navigate, but there are solutions. An excellent option for those lacking other unkillable champions.
Santa Unkillable – 4:3 Stun Target
Santa Unkillable with a 4:3 turn ratio Stun Target like Taurus.
Fast Tower and Maneater Stays Unkillable and Affinity Friendly.
The Two Towers
Two Roschard the Tower on a 5:4 turn ratio, alternating block damage to stay unkillable. Has some difficulty with spirit affinity - beware!
The North Pole
Santa or Tower + Warcaster Unkillable with slot for cleanser for affinity friendliness.