The next time one or more creatures or planeswalkers enter the battlefield this turn, they enter as copies of the chosen creature instead. Basically, you can choose to have an opponents planeswalker or world-ending creature come in as a 1/1 Thopter instead
One of the biggest reasons this card ranks highly is that you have a easily triggered card draw that costs you no mana, so a free sacrifice outlet like Phyrexian Altar does incredible work with your creatures: drawing and paying for spells with very little assistance
According to Weekly MTG, the Counter Intelligence deck heavily focuses on Charge Counters, which probably means that Inspirit will be a better Commander for the deck than Kilo, Apogee Mind despite that cards potential to go infinite rather easily
If this card is Normal or Special Summoned from the hand: Banish the top 4 cards from your Deck
This could be the difference between a Pokmon surviving or not and potentially losing the game for the player, so its spot in the top 10 is warranted
If the opponent is not specifically siding for the deck, winning games 2 and 3 against a deck like Goat Control should be a piece of cake as well