Challenge Grave

Challenge Graves are new types of graves that summon enemies every 5 seconds. They can spawned by the cult zombie. If the outline is purple, it will have 100 HP, if the outline is red, it will have 80 HP, if the outline is gold, it will have 50 HP, if the outline is silver, it will have 25 HP, if the outline is bronze, it will have 10 HP and if there is no outline it will have 3 HP. Here are the summoning patterns in order. It will take 3 summons from each wave pool to move onto the next.

(Imp), (Normal Zombies + Ra Zombie), (Construction cone zombies + dragon imp), (Helmet zombies + NMT Zombies), (All very high defense zombies + BWB zombies (including squid zombie) (All other zombies besides gargunatuars) (All zombies) (Gargunatuars)