Savor the Moment

This card is obviously just insane. I can't believe it's in Standard and I've never seen it before. It's at least gonna draw you another card; and combining with some untapping effects (there were plenty in Eventide/Shadowmoor too I think?) means attacking twice in a row; and with cards with Suspend/cards with Vanishing that you want to die (i.e. Chronozoa) you can really cheat. I'd play this card over Cancel any day (same mana cost).

MERROW COMMERCE!!!!!! Vigilance, pay to untap, heck even storage matrix can make this a timewalk for today. Not a small fortune to get 4 of either. Killer with mind's desire to get to use all your free played cards. This and panoptic mirror are nice.

No untap step but I used this in my Lands deck. Still get the draw step and can play another set of lands using cards like exploration.

I have a Two-Headed Giant deck that revolves soley on taking extra turns; Savor the Moment, Time Warp, Lighthouse Chronologist, and Temporal Manipulation (since Capture of Jingzhou is way out of my price-range). Backed up with Counterspells, Echoing Truth, and Wash Out.

The deck gets even better the more teammates you have, but as a stand-alone deck it doesn't fare so well since it lacks a consistant kill short of attacking with a max lvled 3/5 Chronologist, and/or a couple of Cloud of Faeries.