Black Panther, Wakandan King, Devoted Druid, and Hapatra, Vizier of Poisons

Prerequisites

• Black Panther, Wakandan King on the battlefield
• Devoted Druid on the battlefield
• Hapatra, Vizier of Poisons on the battlefield
• available

Steps

1. Activate Black Panther by paying , moving at least three +1/+1 counters from a land to Devoted Druid, then causing you to gain at least 3 life and draw a card
2. Activate Devoted Druid's first ability by tapping it, adding
3. Activate Devoted Druid's second ability by putting a -1/-1 counter on it Hapatra triggers, creating a creature token
4. When the creature token enters, Black Panther triggers, putting a +1/+1 counter on a land you control
5. Resolve the Devoted Druid ability from step 3, untapping it
6. Repeat steps 2 through 6 until Devoted Druid has no +1/+1 counters on it
7. Repeat from step 1

Results

• Infinite card draw
• Infinite draw triggers
• Near-infinite ETB
• Near-infinite creature tokens
• Near-infinite green mana
• Near-infinite lifegain
• Near-infinite lifegain triggers