Argothian Elder + Griffin Canyon + Unnatural Selection

Argothian Elder

Griffin Canyon

Unnatural Selection

How it works

1. Activate Griffin Canyon's first ability by tapping it, adding C.
2. Activate Unnatural Selection by paying 1, causing Argothian Elder to become a Griffin until end of turn.
3. Activate Argothian Elder by tapping it, untapping Griffin Canyon and another land.
4. Activate Griffin Canyon's second ability by tapping it, untapping Argothian Elder and giving it +1/+1 until end of turn.
5. Repeat from step 3.