Weve got Precon Upgrade Guides for each deck, with a review of how the decks play and feel
There are 35 cards with morph in the set and every single one costs at least 5 mana to turn face-up as long as doing so would make it big enough to eat an opposing morph creature in combat
Ill support it being both at the same time, as it discourages people from attacking you, meaning theyre more likely to attack an opponent and thereby double up the damage on them
But if you are behind a wall of creatures and not threatened, which is common in the later game, then you can rotate his +1 and -1 and over a few turns draws cards, gain life, and influence future combats in your favor
These are good general practices, but again, there are exceptions to these "rules." A very general guideline for a 360-card cube could be: 50 white cards 50 blue cards 50 black cards 50 red cards 50 green cards 50 multicolored cards (five of each color pair) 30 nonbasic lands 30 artifacts Themes The theme for your cube can be anything that interests you as a player
Adding cards with abilities usually associated with another ink color would fill some big holes, especially when it comes to the ink ramp