You want to summon multiple dinosaurs and other big beasts?
This deck is able to shuffle multiple beasts, summon and recruit them via deathrattles, revive them, and so on. From mid game on you are basically summoning big stuff if you play your 4 mana deathrattles right and use them to pretty much chain multiple summons.
The Jailer + Swamp King Dred for a last way out but usually not really needed because you basically can't run out of steam and won before you really need it. but depending on your hand, a lategame option. You can easily swap the jailer with whatever. (N'Zoth, the Corruptor, or another big dino)
If you get the hang of it you are able to summon minions for the whole game from turn 5 on, and they get bigger and bigger.
Oondasta helps to clear your hand of big minions if drawn and is also an excellent target to shuffle into your deck.
The main goal is always to shuffle multiple Sunken Saber to easily trade into the opponents minions + to summon even more beasts for you. If you play your spells right you can easily outlast a big priest for example.