If a player or permanent has more than one kind of counter on it, and you choose for it to get additional counters, it must get one of each kind of counter it already has
If youre doing proxies with custom art, you need to upload them one at a time
What will usually happen is the benefits of all your different cards wanting to do the same thing will begin to compound, and soon you'll find yourself sporting an eight point lore gap ahead of your opponent
However, with the new Commander precon, Corrupting Influence, focusing on the Toxic variant of the mechanic, a lot of players will be trying anyway
EachIkoria: Lair of BehemothsCollector Booster Pack contains
For anyone counting, that means 48 cards here, in addition to the six foils, making for a total of 54