To assist you in this regard, I have some videos of me playing the deck against a variety of scenarios on my stream
Selvala's Stampede gets noticeably worse in decks that run a lot of small mana dorks like Llanowar Elves for ramp, as wild votes may reveal those cards instead of your sweet Terastodons
We changed to the "block an additional ninety-nine creatures" when someone made a joke in the design meeting and I said, "No, we're keeping that." I'm very happy with how the design turned out and I feel that, sitting at rare, it is doing its job perfectly

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This set was designed as a love letter to Generation One, making it an instant classic amongst collectors
Chart shows the price of Invoked Caliga [1st Edition] FUEN-EN027 at the end of each month going back as long as we have tracked the item.