If the target player is an illegal target when Splinter's last ability tries to resolve, it won't resolve and none of its effects will happen
As such, Im of the opinion that hes probably best used in a deck focused around dealing direct damage and cards such as Curiosity
Instead, you get to choose new targets for both spells at random, which can be extremely good against unconditional removal spells, but its pretty useless against counters
For just two mana, the card searches your library for any one card at sorcery speed and places it directly into your hand
Gruul was pretty strong for a while, and Gruul Spellbreaker has always seen play in Gruul decks, but I think its really just a strong but fair creature with current gameplay
Un- sets are no strangers to dice, and Unfinity keeps the good times rolling with a selection of eternal and acorn cards that instruct you to roll six-sided dice