Well, in looking at the ibc pt's decks, I saw plenty of beatdown decks, it's fair share of control decks, and no representation of the third part of the trinity: Combo! So I brainstormed and this is a combo deck (or at least the engine) for ibc.
then you need
and of course you use a domain-ish mana base, heavier on the forests.
Card drawing suggestions:
Win condition suggestions:
The idea (for those who don't get it) is to lay overabundance, then harrow and gaea's balance several times to generate mana, use the mana to draw more cards, rinse, repeat, and hopefully you'll have enough mana in the end to cast your winners. In theory, you can go off 4th turn (3rd turn overabundance, 4th turn harrow to get 5 land, gaea's balance, card draw, etc.). you can toss in some disruption of several forms; since it is domain-ish you can have the collective restraint for critters, but more importantly you can have orim's chant or the black card that removes their hand for a turn so you can safely go off. And sterling grove not only fetches the overabundance for you, it can also protect it.
However you would like to put it together, you can at least have some fun playing combo in ibc. J J J oh… I should name the combo… so I dub thee… um… "Root Beer"!! (get it? IBC? Hehe)