As Obeka can be tapped to immediately end its controller's turn, exiling any spells and abilities from the stack by doing so, Obeka can be activated when this game-loss trigger is on the stack, negating it completely and allowing Last Chance and Final Fortune to function as two-mana extra turn spells with no drawbacks
You won't gain life
The Metalcraft restriction initially looked balanced on paper, but Artifact decks consistently enabled it with ease
In fact, experts believe we may be approaching an event horizon where more Magic cards are printed than there is money in the world to buy them, at which point we'll see economies crumble, governments topple, and trading cards become the only accepted currency across the globe (keep your rare MTG cards close
A 20 years old card has to adhere to the same criteria as a 2 days old card
He's a solid inclusion in Vampire Tribal decks, especially when you consider that some of the better Vampire cards have a habit of stealing creatures such as Olivia Voldaren and New Blood, so you can steal your opponent's commanders and they'll benefit from the Steward