Exile the chosen creature, then its controller gains life equal to its mana value
Whether built into your laptop or bought separately as a cheap purchase, they're pretty commonplace
Secondly, and more broadly: in an 'unknown' environment, particularly a post-large-set new environment, new decks are generally likely to do better than established decks, because it's much easier for the new decks to prepare for an established metagame than for the established decks to figure out which of the new decks are most critical to adapt to
If you silo the two sides too much mechanically, you cut down on the possible combinations players can draft or build
While theres plenty of fixing to unlock greedy four- and five-color decks, sticking to one color lets you focus on your other priorities when other players are squabbling over lands
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