Winning the die roll, and then not stumbling, are crucial to beating the aggro mirror
For example, if two creatures you control with lifelink deal combat damage at the same time, Enduring Tenacity's first ability will trigger twice and you may choose a different opponent for each trigger
In a format as fast as modern, there will be lots of instances where you need to get Ensnaring Bridge online asap
Naturally, with so many cards, power levels can vary wildly
While Krav possesses characteristically Black abilities that allow its controller to sacrifice creatures for numerous forms of value, such as cards and life, Regna is characteristically White, creating Soldier tokens each turn as long as her controller is gaining life
So, you get an enchantment creature token that is a Nymph and 2/2 whenever you cast your first enchantment spell each turn, possibly also triggering some constellation