Here Doggy

Companion - All lands you control have “{T}: Double the amount of mana this land could produce.” (If this card is your chosen companion, you may cast it once from outside the game.) Flash, Haste, Vigilance, Lifelink When Sassy enters the battlefield each opponent mills the top of their library until they reveal a nonland permanent. You may choose to put it on the battlefield under your control if it’s a creature, or put X +1/+1 counters on Sassy if it’s not a creature. Where X is the total mana cost of nonland permanent.