Even if youre playing a badly-supported typal deck like warlocks, giants, or something similar, these creatures grow your team, and they also work very well with changelings
For an interesting reanimation card that plays into dredge, check out You can also go the "Raise Dead" route
Wed eventually begin to see other types of supplemental sets that introduced new cards to the game but still wouldnt be introduced to Standard as traditional expansions
Once Tergrids in play, cards like Fleshbag Marauder and Plaguecrafter can help you develop a board presence, while cards like Pox and Dark Deal practically win you the game thanks to Tergrid's amazing sacrifice and discard payoffs
The body here isnt bad for 3 mana either
You tend not to use it straight away since it scales with the cost of creature you cast, and you just spent 3GG on Vivien