BUG - Graveyard Fun

This is a deck I own that plays with the graveyard. And since in the graveyard one can find lots of kinds of carrion bugs, the name seems to be quite fitting to this dredge deck.
It can, as always, be worked out. The most important card would be Genesis and although I know I own one, I can't find my copy anywhere.
Anyway, there goes the deck. Discuss it as you see fit.

Deck:
LANDS - 22
5 Swamp
3 Island
2 Dakmor Salvage
2 Riftstone Portal
2 Tainted Isle
1 Duskmantle, House of Shadow
1 Flooded Grove
1 Gemstone Mine
1 Llanowar Wastes
1 Pendelhaven
1 Urborg, Tomb of Yawgmoth
1 Vivid Creek
1 Vivid Grove

SPELLS - 19
4 Oona's Grace
4 Tolarian Winds
3 Dread Return
2 Brainstorm
2 Mental Note
1 Breakthrough
1 Life from the Loam
1 Monstrify

CREATURES - 19
4 Putrid Imp
3 Twisted Abomination
2 Golgari Thug
2 Ichorid
2 Shambling Shell
2 Stinkweed Imp
2 Wonder
1 Akuta, Born of Ash
1 Golgari Grave-Troll
1 Looter il-Kor

This way I can easily send EVERYTHING to my graveyard and start tutoring whatever I need from there. As it stands I believe that dredge was one of the most powerful abilities ever created.

PS - After looking at some of the new cards (Eventide) I noticed that several do look great on this deck: retrace!!! So, expect further changes here.