Paleozoic cards are trap cards that can be special summoned as level 2 aqua type normal monsters, which will get boosted by Wetlands. This will make them all to 2400 attack. They can also be easily summon and are unaffected by monster effects.
Frog monsters are mostly low level aqua type monsters. They have some pretty decent effects and will have pretty high attack once you have Wetlands active. Submarine Frog will be 2400 attack piercer monster, and Unifrog can destroy spell/trap your opponent controls.
Wetlands can be good in a water deck as well. Hammer Shark helps special summon low level Aqua type monsters to summon monsters like Star Boy. Star Boy increases your Water monsters' attack by 500, including itself. When you have Wetlands active, Star Boy will be a 2250 level 2 monster.
I've been playing a Paleozoic/Wetlands deck on the side for a while. Problem is, you kinda have to rely on your opponent to do things you can activate trap cards in response to, and there's sort of a delay on summoning anything at all. Pikaia and Jar of Greed will only take you so far, realistically.
finally it arrives after like 999999999 mil years.
now my paleozoic'ed paleozoic can see some action after being dead for like a paleozoic amount of time.
Hopefully it's not too paleozoic to play paleozoic now.
Thanks konami for being so paleozoic.