Lurking Roper + Elemental Mastery + Kor Celebrant

Lurking Roper

Elemental Mastery

Kor Celebrant

How it works

1. Activate Lurking Roper by tapping it, creating four 1/1 Elemental creature tokens.
2. When the Elementals enter the battlefield, they trigger Kor Celebrant four times.
3. Resolve the first Kor Celebrant trigger, causing you to gain one life.
4. Lurking Roper triggers, untapping itself.
5. Repeat.