Lurking Roper + Splinter Twin + Angelic Chorus

Lurking Roper

Splinter Twin

Angelic Chorus

How it works

1. Activate Lurking Roper by tapping it, creating a token copy of itself.
2. When the Lurking Roper token enters the battlefield, Angelic Chorus triggers, causing you to gain life equal to the Lurking Roper token's toughness.
3. Each Lurking Roper you control triggers, untapping themselves.
4. Repeat.