Thranduil, the Elvenking + Devoted Druid + Tromell, Seymour's Butler

Thranduil, the Elvenking

Devoted Druid

Tromell, Seymour's Butler

How it works

1. Activate Thranduil using Tromell's ability by tapping it, putting a +1/+1 counter on Thranduil for each nontoken creature that entered under your control this turn.
2. Activate Thranduil using Devoted Druid's second ability by putting a -1/-1 counter on it, untapping it.
3. Activate Thranduil using Devoted Druid's first ability by tapping it, adding .
4. Activate Thranduil using Devoted Druid's second ability by putting a -1/-1 counter on it, untapping it.
5. Repeat.