Sören, Saw it All

Haste
When Sören enters, tap all opponents creatures.
{t}: Put a stun counter on each creature an opponent controls.
If there are creatures with stun counters on them, Sören gets +18/+0 and first strike

Partner with Lisi, The Showstarter (When this creature enters, you may put Lisi into your hand, then shuffle.)

"His double-taps are omnipresent. How does he do it?!"
—Franconian Tale