Haretta, Born with the Pack

Wolf convoke (Your Wolf creatures can help cast
this spell. Each Wolf creature you tap while casting it
pays for {1} or one mana of that creature's color.)
Whenever Haretta, Born with the Pack attacks or
blocks, create a 2/2 green Wolf creature token
that's tapped and attacking the same player or
that's blocking the same creature. Then, you may
sacrifice another non-Wolf creature. If you do,
put a +1/+1 counter on each Wolf you control.