Kefnet's Monument + Tangleroot + Dream Stalker + False Dawn

Kefnet's Monument

Tangleroot

Dream Stalker

False Dawn

How it works

1. Cast False Dawn by paying 1, drawing you a card.
2. Cast Dream Stalker by paying .
3. Kefnet's Monument and Tangleroot triggers.
4. Resolve the Kefnet's Monument trigger, tapping target creature an opponent controls.
5. Resolve the Tangleroot trigger, adding .
6. Dream Stalker enters the battlefield, returning it to your hand.
7. Repeat.