If you somehow can't discard a card (probably because you had no cards in hand and another effect prevented you from drawing cards), you won't put any counters on Cait no matter whether or not the defending player discarded a card or what that card's mana value is
Firion, Wild Rose Warrior Firion, Wild Rose Warrior is a house with equipment, as you can have situations when you cast an equipment that costs 2 or less to equip, make a token copy of it, immediately equip another creature, and attack
If you've been looking for a different kind of artifact or counter deck, this is for list is for you
Then, you need to get your high-cost cards like Maui, Demigod, and Simba, Rightful Heir on the board right away, before your opponent has enough ink to answer them