Even without other synergistic effects, you're effectively getting a 2/1 creature for with no extra card opportunity cost, which is far from a bad deal
Any enters-the-battlefield ability of the new creature will trigger
The fair bucket is the largest, containing cards that are efficient and powerful, but that have a lot of redundancy within the Cube, such as Lightning Bolt, Counterspell, Llanowar Elves, cheap creatures meant for combat, and even big finishers like Frost Titan
[W][W] Hail Blizzard: 60x damage
I prefer to play a full set of Ash Blossom, Effect Veiler, and Infinite Impermanence, as well as Crossout Designator targets of Ghost Belle, Mourner, and Ogre (your mileage may vary)
Destiny HERO - Blade Master X DARK Level 3 [ WarriorEffect ] ATK 300 DEF 600 During your opponent's Battle Phase (Quick Effect): You can discard this card