unstable, 5 minutes/catalyst
As two actions, you can create a vial of liquid with a cricket that continuously expands suspended in it. The vial can be poured on an insect to transform it into a giant version of its natural form. The insect is friendly to you and your companions, and it disappears when it drops to 0 health, when you use another giant insect liquid concoction, or when the concoction ends.
Centipede. A centipede becomes a Giant Centipede.
Spider. A spider becomes a Giant Wolf Spider (+2 damage on bite) or a Giant Spider.
Wasp. A wasp becomes a Giant Wasp.
Other Insects. An insect becomes a Swarm of Insects.
The GM might allow you to choose different targets. For example, if you transform a bee, its giant version might have the same statistics as a giant wasp.
Any creature you animated with this spell acts after your turn. You can verbally command the creature if it is within 20 meters of you (if you control multiple creatures, you can command any or all of them at the same time, issuing the same command to each one). The creature(s) will generally follow any specific verbal commands that you issue to them if the likely outcome is in accordance with its desires (no action required by you). For example you may command it to guard a particular chamber or corridor, explore the room ahead, or to attack a specific creature. If you don't issue any commands, they defend themselves from hostile creatures, but otherwise take no actions.
Augment
You can transform one additional creature for every 1 additional catalyst expended.
Swarm of Poisonous Snakes. You can expend 1 additional catalyst to transform a snake into a Swarm of Poisonous Snakes. You can transform one additional creature for every 2 additional catalysts expended.
Giant Scorpion. You can expend 1 additional catalysts to transform a scorpion into a Giant Scorpion.