You want to design the main effect to have an impact but not necessarily completely derail things, and this falls squarely into that category, allowing for voltron builds to get the maximum value without being totally useless for everyone else
The third major set for trading card game Disney Lorcana, Into the Inklands, saw the arrival of another 200-odd cards into the game
14 creatures at 4 CMC or more, and some weird sorceries and an enchantment that makes no sense
Dive into the world of Pokmon confidently, knowing you've got the real deal in your hands
Undying (When this creature dies, if it had no +1/+1 counters on it, return it to the battlefield under its owner's control with a +1/+1 counter on it.) Use the power of the Wraiths as the triggered ability resolves to determine the value of X
This numbered Viscera Seer was printed as a rare Bonus Slot card in an older Secret Lair product