To determine a spell's total cost, start with the mana cost (or an alternative cost if another card's effect allows you to pay one instead), add any cost increases (such as kicker), then apply any cost reductions
The Emerald cards seem less focused, with a few different tricks like item removal, and a couple of cards that care about moving to the new Disney Lorcana location cards
They each deal damage equal to their power to target creature an opponent controls
The first iteration of games like this must be so difficult
Since ninjutsu is an ability, it can't be countered by most counterspells, making it easy to guarantee Ink-Eyes connects for damage
A two mana 2/1 with First Strike is a very nice card for Limited, and this one comes with a nice tax effect