Sven, Wunderling Lord

Riot
Creatures you control have Riot.
When Sven enters the Battlefield, create a
number of 1/1 Wunderling creatures equal
to ten plus the number of Wunderlings
you control. When Sven attacks, Wunderlings
get +1/+1 until end of turn.

"It's the Rhythm of the Wild, oh oh... oh yeah!"
Sven, Wunderling Lord