magic deck ideas

Viridian Shaman + Umbral Mantle must be one of the easiest two card combos. Both cost 3 and together (plus 2 mana) you get infinite mana and power/toughness. It's only beat by Painter's Servant + Grindstone, which creates its own win condition.

The only problem is that the fastest you can get the combo to work is turn five. There are probably already significant threats to deal with by turn five. Your opponent has probably already drawn a removal spell or a counterspell by turn five (and countered one of your combo pieces). And if you don't win on the turn you combo (you haven't drawn a win condition), it becomes increasingly difficult to protect your combo.

Here's how a typical game might look:
T1 ?
T2 ?
T3 viridian shaman (2g)
T4 umbral mantle (3) + 2 mana. win condition.

So I need to have both combo pieces AND a win condition AND five mana by turn 4/5 to win reliably. This means: 4 * llanowar elf, 4 or 3 * fertile ground.

To fix the mana base, need 4* seaside citadel.

Alternatively cut the wargates altogether.
Instead:
4* viridian joiner
4* umbral mantle
4* drift of phantasms
2* whispersilk cloak
4* counterspell/broken ambitions
4* oona's gatewarden OR traproot kami
4* llanowar
4* fertile ground
4* mulldrifter
1* garruk
1* glen elendra archmage

Lands: 4* breeding pool (oh I wish)
4*flooded grove (I wish as well) or 4*yavimaya coast
x* forests
x* islands
simic signet?

(Instead of 4* simic growth chamber and 4* seaside citadel)

other deck ideas:
1. sigil deck. need recurring enchantments (especially things like prison term, faith's fetters, curse of chains)

2. gilt-leaf archdruid. There must be a way to abuse this card and it basically involves mirrorweave or shield of velis veil
3. where ancients tread + nightmare + stampeding widebeests.