It can manifest in subtler ways too, however, as it has here in Bloomburrow
Unstable provides two of them with Clever Combo and Teachers Pet
Unsurprisingly, more expensive variants do exist, such as the $477 Kaladesh Invention
You don't play it as a one drop as you might with Force Spike as it isn't a useful one drop when on the play as discussed
Endless Darkness will do 70 with 3 Darkness attached, an extra 20 if you leveled up from Darkrai (DP52) and have Cresselia on your bench, and if your opponent stays asleep between turns, add an extra 10 for each Darkrai G on your bench, (Yes, Darkrai G is Stackable!) So, 90 damage with an ideal set up, add 10 or 20 with Darkrai Gs on the bench, and Crobat G if you need the extra damage
Its combination of Water and Psychic typing makes it a unique and strategically interesting choice for players, offering a blend of offensive and defensive capabilities