Roxanne, Trainer of Trainers

Whenever another creature with power 2 or less
enters the battlefield under your control, you
may pay {1}, if you do, target player draws a card.
Whenever an opponent draws a card except the
first one they draw in each of their draw steps,
creatures you control get +1/+0 until the
beginning of the next end step.
Would you kindly demonstrate how you battle?