Infinite cats

If an effect would create one or more tokens under your control, it creates twice that many of those tokens instead. If an effect would put one or more counters on a permanent you control, it puts twice that many of those counters on that permanent instead.

This creature must be blocked by exactly one creature if able. Whenever this creature attacks, create X tokens that are copies of it and that are tapped and attacking, where X is the number of creatures defending player controls. Exile the tokens at the beginning of the next end step.

Kicker (You may pay an additional as you cast this spell.) Create a token that's a copy of target creature. If this spell was kicked, create five of those tokens instead.