If one player is just sitting behind an Island Sanctuary not doing anything, the other has all the time in the world to look for fliers, islandwalkers, enchantment removal, direct damage, whatever
If youre bringing custom cards or proxies to a table, a five-second heads-up avoids 95% of awkwardness
Because +1/+1 counters enhance a creature, you usually use them on your creatures
Draw Engines/Win Conditions Since our game plan is to drown the opponent with value, our draw engines become our win conditions through the other cards we play
Thats what we call the defender mechanic, and thats what today is all about
They do, however, introduce new concepts with a higher complexity than starter decks