@Rabblemaster:
As far as that four-color build goes, it looks neat, but Titan's presence doesn't seem like the greatest card imho. Forcing yourself to have 2 cards in hand just to deal with one card is awfully rough and can get you in to trouble. Something like Fleshbag is a much more efficient answer to Ulamog, especially when you have multiple ways to re-buy it in your deck via Gravedigger/Skaab/Cruel Revival.
Actually most good drazi decks especially the selesnia ones include powerful recursion of their own.
Fleshbag/digger/ will not save you when he is just bringing it back to hand with emeria angel and recasts it, targetting your Islands.
Titan's presence
Deals With It. It makes it so that beyond the counters, you have 3 instant answers to Ulamog and friends. Everything smaller we can block/whipe/destroy. VS white eldrazi for instance the main targets would be Ulamog and the emeria angels. The sowers and green dudes we can just trade with, since we have plenty big dudes too. Twins are a bit harder, but that's why we have Breaker of Armies , ob nixilis, jace recurring spells, etc.
I'm not saying this deck will beat Acid Mossdrazi. But it should be competitive. may have to go +1 land still.
Preliminary testing :
vs rank 40 Orzhov White Weenie with Value : 2/0. (never saw a single sweeper, Brilliant Spectrum, Titan's Presence, Breaker and Ruin Processor MVP's)
vs AcidMossgreendrazi: 1/1 moss moss, not always enough. On the play it's tough though.
vs GolgariDrazi: 1/0
vs my own Dark Depths: 0/1 but I was mull to 6 on draw, and he Had It AND I miscounted.
vs selesnya drazi: 0/1 took him
4 moss on the play AND a T4 gideon AND an on curve awakened outburst to beat me. He was out of recources. 4 moss and still almost lost, the asshat. Totally outplayed. but hey yolo 4 moss and Gideon for the skillwin.
vs Sultai Reanimator: 1/0 he discarded Ulamog on the draw during his
mainphase T4 to epiphany . Guess what happened.