Artemis, Destroyer of Cheerios

When Artemis, Destroyer of Cheerios enters the battlefield,
create 3 1/1 Cheerio creature tokens with,
sacrifice this Cheerio for 5 life. Whenever
Artemis, Destroyer of Cheerios attacks or blocks,
put up to two +1/+1 counters on Cheerios you control.
When you sacrifice a Cheerio with a +1/+1 counter,
you gain 5 more life for each counter.