Though, the energy requirements for those attacks still need to be met
Players are incentivized to mulligan until they have a greater chance of comboing on turn 2, which leads to plenty of non-interactive games
Unfortunately, its just a pretty low impact green creature to spend 7 mana on in the age of Vaultborn Tyrant and Atraxa, Grand Unifier
We've seen some other semi-popular Kamigawa cards like Oboro, Palace in the Clouds and Minamo, School at Water's Edge maintain huge prices despite fairly low play, which means if Shining Shoal does develop into an archetype staple in Modern, its price could climb even higher
Slobad, Goblin Tinkerer: A good way to protect a valuable artifact with the sacrifice of a less valuable artifact