Kefnet's Monument

Each Monument's triggered ability triggers as the creature spell is cast and resolves before that creature spell resolves. The ability will resolve even if that creature spell is countered.

The triggered ability of Kefnet's Monument doesn't tap the creature. It can target any creature, tapped or untapped. If that creature is already untapped at the beginning of its controller's next untap step, the effect won't do anything.

To determine the total cost of a creature spell, start with the mana cost or alternative cost you're paying, add any cost increases, then apply any cost reductions. The mana value of the creature remains unchanged, no matter what the total cost to cast it was.