How to make a lot of rhinos

Enchant player At the beginning of enchanted player's first upkeep each turn, that player gets an additional upkeep step after this step.

Trample At the beginning of your upkeep, if you control a blue permanent, you may create a token that's a copy of this creature.

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.