There are several cards revealed in Rise of the Floodborn that reward players from being really, really aggressive with challenging
As long as you keep another creature or two and play some extra lands, the +1/+1 counter doubling goes nuts and makes the math really difficult to oppose in combat
Debuting in Commander 2015 on the card Broodbirth Viper, this ability allows the creature that hosts the ability to duplicate itself and attack each other player in your Commander pod
The set will feature 165 cards before secret rares, so the Trainer cards, Energy, and secret rares haven't been revealed yet
Its something Ive always associated with red cheek E3 pikachus, as all of mine have this coloration
You can also have up to 59 copies of each Basic Energy card, not counting non-foil energy cards without a collector number or expansion icon