It's a Matter of Time

This is a resilient gauntlet deck that's focused around building up Time influence and cards that benefit from it (Alhed Ascending, Worldly Cleric, Twinned Spiteling, and others). There's enough life gain to handle the early rush decks and a strong late game.

In terms of strategy, try not to play Alhed Ascending until you have at least six Time influence, and waiting for eight is even better if it makes sense. Similarly, saving Worldly Cleric until you've built up a good amount of influence can be a good idea, though it's often correct to play her out early to trade with an aggressive unit while netting a small life gain as a bonus.