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The reminder text for proliferate states: Choose any number of permanents and/or players, then give each another counter of each kind already there

The price for the easier mana of a Temur commander instead of all five colors is losing access to powerful cards like Rivaz of the Claw, Taigam, Ojutai Master, Ancient Brass Dragon, and the other 5-color dragons

You can activate Deck Lockdown to prevent both players from adding cards from their deck to their hands, apart from the draw phase, and prevent your opponent from special summoning from their deck

Victini [Reverse Holo] #20 (Pokemon Evolving Skies | Pokemon Cards) prices are based on the historic sales