Fortunately, there are many cards in MTGs history that trigger at the beginning of your upkeep to benefit from Obekas ability
Form of the Approach of the Second Sun (38 characters) Un-sets are known for adding some meta-game mechanics and interactions
Venusaur Expedition ($110) Introduced in the first e-Card expansion of the Pokemon TCG, Expedition Venusaur was found in the 2002 Expedition Base Set
Biggest Omissions: Crucible of Worlds $69.99 Chalice of the Void $69.99 Horizon Canopy $69.99 Karn Liberated $59.99 Mox Opal $59.99 Engineered Explosives $59.99 Emrakul, the Aeons Torn $54.99 Ensnaring Bridge $49.99 Grove of the Burnwillows $49.99 Arcbound Ravager $44.99 Aether Vial $39.99 Mishras Bauble $34.99 Blightsteel Colossus $34.99 Flagstones of Trokair $19.99 Inkmoth Nexus $25.99 Celestial Colonnade $23.99 Spellskite $22.99 Blackcleave Cliffs $22.99 Oblivion Stone $22.99 Creeping Tar Pit $19.99 Batterskull $18.99 Glimmervoid $26.99 Eldrazi Temple $9.99 Steel Overseer $9.99 Valakut, the Molten Pinnacle $7.99 Expedition Map $2.49 Modern Masters 2017 was light on the artifacts, so this list is pretty long

PRODUCT HIGHLIGHTS Contains 6 booster packs and 6 Ultra Rare cards Includes the original three God Card Promos Company: Konami Brand: YuGiOh Series: Legendary Collection 1 Item Type: Binder Release Date: September 2010 UPC: 083717884262 Stock #: 343839 Our Guarantees to You, Our Valued Customer
Affinity is an aggro deck and a synergy deck both at once