Using [c]Reanimate[/c], the namesake card of the deck, or a similar effect, reanimator decks can play extremely powerful creatures from the graveyard straight to the battlefield
If your dino deck is packed with dinos (which it probably ought to be if it's a dino deck), consider including Vaultborn Tyrant, a mega-resilient dino that'll surely be drawing you tons of cards
level 10 4.5.1
Grist, the Hunger Tide is a three-mana Black and Green planeswalker that can do a bit of self-mill and make Insect tokens, sacrifice creatures to destroy creatures or planeswalkers, or drain the life from your enemies based on the number of creatures in your graveyard
Having so many modes on each spell means that chances are you'll have the answer for any given situation
These cards often feature exclusive designs, such as the Golden Magikarp and Golden Gyarados released in special Japanese sets