Generally, its trivially easy to make sure this wont backfire, and even if it does, theyre now spending 2 mana on your turn for a spell that they just watched you cast for 1 mana
Here is an example of some popular Cube archetypes for each color pair
Skanos may be a worthy consideration in specific tribal or dragon-themed decks, but overall, it may struggle to see play in more competitive environments
The problem, of course, is that you're also less likely to win when you keep a bad opening hand
Sprigatito ex and Armarouge ex Deck Celebi - Grass - HP80 Basic Pokemon [C] Collect: Draw a card
Part of this choice, according to designer Miller, was to allow characters to explore different aspects of their personality and the game