Quote Originally Posted by k_omega View Post
I've been a bit dissatisfied with Explore in my mono-G build; I just exchanged them for Explorations and started testing that version. Situations where I had an extra land to play but not 1G to spare or where I had 1G available but no extra land occurred too frequently. Also Exploration allows for T2 Trinisphere where Explore does not, improving the combo matchup. Exploration might be even better for you than for me because Brainstorm and Repeal mean you draw more cards, so that you are more likely to have 2 lands in hand in a single turn to make use of the enchantment later in the game.

So consider switching the numbers on Explore and Exploration. At the moment my plan is to side out Explorations in matchups where speed is not critical; you might side them out in favor of some kind of board wipe which I see you don't have in the main. Since you and I both lack explosive SnT -> Titan -> Eldrazi lines we can't always plan to just ignore the board and hope Emrakul is enough. I've come to favor 2 Ugin and 1 Oblivion Stone main with 1 Stone/All is Dust in the sideboard, but they're all mostly interchangeable.
I don't know in UG build which is better, but in the mono green I think explore is better than explorations. We don't have cards that give cards advantage, exploration is good if you always have 2 lands in your hand: after the opening hand, we have only maps to get lands in hand. Explorations is good also if you drop it on t1. And to do this, you have to put 4 of them in your deck. I think we can better use these slots....it's not a MUST card for our deck, does it deserve 4 slots? I don't think....also if you have one of them in t1, the others are dead draw. With explore the draw effect is always usefull, also at t6; you are not forced to put 4 of them in your deck; 1G is not so worst than G.