While proliferating multiple times, players can't respond between proliferating the first time and proliferating the second time, and so on
If Bruse Tarl and Ishai are your commanders, your deck may contain cards with red, white, and/or blue in their color identity, but not cards with green or black
However, because the counters are removed, it is difficult (but not impossible) to make multiple players lose the game from this ability in the same combat phase
A Roaring Guest List explores an under-the-radar archetype within the Emerald/Steel ink color combo sometimes called a Ping deck
Epic Rarity game cards were introduced in Fabled (the 9th set), and while gameplay with Epic Rex is the same, the cards unique design, with no black border, makes it stand out
If an effect moves a melded permanent to a new zone and then affects "that card," it affects both cards