Agatha of the Vile Cauldron, Cryptolith Rite, Devoted Druid, and Barrenton Medic

Prerequisites

• Agatha of the Vile Cauldron on the battlefield
• Cryptolith Rite on the battlefield
• Devoted Druid on the battlefield
• Barrenton Medic on the battlefield
• Agatha of the Vile Cauldron has power 4 or greater
• available

Steps

1. Activate Agatha of the Vile Cauldron by paying , giving all other creatures you control +1/+1, trample and haste until end of turn
2. Activate Devoted Druid and Barrenton Medic by tapping them, adding
3. Activate Devoted Druid and Barrenton Medic's second abilities by putting a -1/-1 counter on them, untapping them
4. Repeat

Results

• Infinitely large creatures until end of turn except Agatha of the Vile Cauldron, Devoted Druid and Barrenton Medic