Any card that reads "At the beginning of your upkeep" will trigger once for each extra upkeep Obeka provides, and some upkeep effects are very powerful
It will depend on so many factors
If we just focus on the paper prices, Battle for Zendikar is clearly the most expensive Standard format since the Caw Blade era
Thats because almost all of the cards featured are Enchanted Rares which share similar theming, with the cold, snowy theme echoing the Winterspell sets story
Although, yet again, it's an old format doing the heavy lifting: Boros Aggro decks bursted into the Legacy metagame by the end of last year, have been gaining a lot of traction since then, and have had a pretty good run in the last few weeks Source: MTGTop8 including the #1 spot in the recent MTGO RC Super Qualifier.And Sand Scout, from Outlaws of Thunder Junction Commander , is usually a 4x in this deck