This is a simplified simulation of the Momir Basic format found on Magic Online. Clicking "Activate Momir" spends all your available mana to discard a card and generate a token of a random creature with that mana value. Once you have this token, you can click to tap/untap or click the red X to remove it. (Assume your deck is composed of infinite copies of a basic land with all basic land types.)
Have fun!