The deck performed incredibly well (given that I had assumed it would completely flop).
Round 1 - vs. Aggro U/B Eldrazi. 2-0. The opponent's deck was nowhere near complete, though, and the sweepers proved invaluable against the small hordes of Eldrazi which appeared. Ojutai's Command countered Reality Smasher, and then I just fished for the remaining Alignments, scrying with my one in play. Aligned the Hedrons. Next game was similar to the first.
Round 2 - vs. B/W Allies. 2-0. My opponent was fairly new and unfortunately kept hands with very few lands. Again, Languish triumphed over hordes of small creatures when he finally drew into lands, but by then the hedrons had finished aligning anyway. Game 2 was much the same.
Round 3 - vs. 5-colour good-stuff. 2-0. Incredibly interesting deck to play against. I had no idea what was in it, and as a result I played overly cautiously in game 1. Hedrons eventually came out, with my removal doing hard work to kill a variety of dragons. However, as I aligned the last Hedron, my opponent played Tragic Arrogance, sending a third Alignment to the graveyard and ruining any chance of the combo working. So I switched strategies, casting two Planar Outburst and Scatter to the Winds with awakening to win the game. Game 2 was also quite tight, as I now lived in fear of Tragic Arrogance. But now that I knew it was there, I kept some counterspells up at all times. I 'boarded out some of my removal for smaller creatures as the opponent's deck had major bombs, in favour of more counterspells. Gaea's Revenge made a surprise appearance, but I had very fortunately cast Planar Outburst with awakening the turn before, so I was able to block it with the awakened land and a Shambling Vent. However, she never got to all 5 colours (notably missing white) so the Alignment went off that time.
Game 4 - vs. ramp Eldrazi. 1-2. My opponent in this game was the person who helped me brew the deck, so he knew it pretty well. Game 1 went nicely in my favour for although his deck ramped up ridiculously fast, he didn't draw anything to actually play. I quickly aligned the hedrons and won. Game 2 was much more intense. World Breaker disrupted my Monastery Sieges, and I threw too many counterspells down against those kind of threats, trusting my Immolating Glare to deal with anything that landed. But Ulamog landed. And his attack exiled the last two Alignments. Game 3 was very close. I'd killed one Ugin and a host of smaller threats. He had one card in hand, so I got greedy and played Monastery Siege so I could start drawing extra cards again (tapping out so I couldn't cast Scatter). Turns out the last card in his hand was the other Ugin. Good games.
Game 5 - vs. B/W allies. 1-2. Game 1 I made an absolutely tragic decision to try to mill him to death with Jace's ulti over assembling the hedrons. I didn't consider that he might be running Rally the Ancestors for some reason, and ended up dying to it. Game 2 was better. I brought in all my Hallowed Moonlight, which trashed a March from the Tomb. Gideon and Sorin were major pains to deal with, but Jace helped me recast Silumgar's Command to kill them both. Aligned the hedrons and won. Game 3 was rushed as we only had 5 minutes left of the round. As a result I didn't get to shuffle fully. I kept a hand of 6 lands and just drew more onto that, resulting in some disappointment on my part.
Deck ended 3-2, but it felt extremely powerful. Both games it lost were really close, and I definitely defeated myself in the last round. I'm excited to keep tinkering with it. Will try adding Empty the Pits and Gideon's Phalanx as alternate win-cons and against Gideon himself.