A player with Magical Scientist could summon a variety of useful fusion monsters and if they were sent to the Graveyard before the end of the turn they could be used as fodder for summoning a Chaos monster
Alongside being a Companion card, it can also be tapped for all colors of land for a player's mana pool
Another simple test is to hold the card up to a light source
Its easy to cast creatures from exile these days, with mechanics like foretell or red impulse draw
2: Create a 1/1 blue Ninja creature token with "This token can't be blocked." 7: You get an emblem with "Whenever a creature you control deals combat damage to a player, search your library for a blue or black creature card, put it onto the battlefield, then shuffle." Legendary Planeswalker - Kaito Karlach, Fury of Avernus Whenever you attack, if it's the first combat phase of the turn, untap all attacking creatures
It's also a bit of a money pull, with current versions bottoming out near the $30 mark