Choose a Dragon-focused commander with a clear payoff Start with a commander that does one main thing extremely well, such as cost reduction, token generation, tutoring, combat amplification, or mana generation
With potential effects ranging from draw power to Creature Token generation and +1/+1 counters, Hylda ensures that you arent just stopping your opponents plays, but building up your own
Green has a modal situational removal card combining with Tangletrap
A buyback spell could very easily be rewritten with kicker instead, with rules text that returns the spell to hand after resolving if the kicker cost was paid
Esper Sentinel Like Mystic Remora, but in white and much, much better: It has no cumulative upkeep, and it can block in a pinch
It gives your opponent three 2/2 Zombie tokens at the start of your upkeep, and, as such, your opponents are always creating more creatures than you generally can handle