Naru Meha, Master Wizard | Saw in Half

Cards

Naru Meha and
Saw in Half in hand.
You control at least one creature.
({4} magic symbol) ({U} magic symbol) ({U} magic symbol) ({B} magic symbol) available.

Cast
Saw in Half by paying ({2} magic symbol) ({B} magic symbol) , targeting any creature.
Holding priority, cast
Naru Meha by paying ({2} magic symbol) ({U} magic symbol) ({U} magic symbol) .
Naru Meha enters the battlefield, copying
Saw in Half targeting
Naru Meha.
Resolve the copy of
Saw in Half, destroying
Naru Meha and creating two token copies of it with base power equal to half the destroyed creature's power and base toughness equal to half the destroyed creature's toughness, rounding up each time.
Put one of the
Naru Meha tokens into your graveyard due to the legend rule.
Both
Naru Meha tokens enter the battlefield, triggering themselves.
Resolve the first
Naru Meha trigger, copying
Saw in Half targeting the remaining
Naru Meha token.
Repeat from step 4 an arbitrarily large number of times.
Once you have a large amount of
Naru Meha triggers on the stack, you may resolve those triggers, copying
Saw in Half targeting any creature you control to create infinite token copies of the creature(s).
You may also resolve the
Naru Meha triggers, copying any other instant and/or sorcery spells on the stack.