While that ends up being close to negligible in the Underground Sea case where shipping will be $2-3 for a $250 card, it ends up being extremely relevant when dealing with $3-5 cards like Golgari Grave-Troll
Assuming you do a little bit of setup (easily achieved with access to greens ramp and blacks tutors), you can have some protection spells ready with Swiftfoot Boots, some Impact Tremors-like effects, and some sacrifice synergies like Blood Artist and Mayhem Devil to maximize the damage those Kobolds deal on the way in and on the way out
I have quite a few cards without Flash, however, and I decided rather than cut them, to instead run Vedalken Orrery, Leyline of Anticipation and Teferi, Mage of Zhalfir
Let's dive straight in to these brand-new decks and discover some surprising new cards and impressive reprints
Since damage persists in the form of counters, their 3/3 would effectively turn into a 3/1, but there is no real difference between a 3/3 and a 3/1 when wed challenge it with our 3/4 on the subsequent turn