For 4 mana, you get a great creature, ramp, and pump
I still miss one drop mana dorks
Fortunately, there are many cards in MTGs history that trigger at the beginning of your upkeep to benefit from Obekas ability
2 Chandra, Torch of Defiance 1 Karn, Scion of Urza 4 Bomat Courier 4 Scrapheap Scrounger 2 Kari Zev, Skyship Raider 2 Pia Nalaar 4 Goblin Chainwhirler 2 Rekindling Phoenix 2 Hazoret the Fervent 2 Glorybringer 2 Doomfall 1 Cut // Ribbons 2 Magma Spray 3 Abrade 2 Heart of Kiran 4 Dragonskull Summit 4 Canyon Slough 2 Aether Hub 14 Mountain 1 Swamp 1 Pia Nalaar 1 Chandra, Torch of Defiance 2 Karn, Scion of Urza 1 Magma Spray 2 Doomfall 1 Siege-Gang Commander 3 Chandra's Defeat 1 The Eldest Reborn 2 Duress 1 Sorcerous Spyglass The story of Standard at the 2018 Magic World Championship was written in red and black
Commander Text: Spirits you control get +1/+1 and have trample and haste
Finally, this product includes an instant and a sorcery in Duelist's Flame and Fated Clash