Garth One-Eye, Necrotic Ooze, Krosan Archer, and Devoted Druid

Prerequisites

• Garth One-Eye in the graveyard
• Necrotic Ooze on the battlefield
• Krosan Archer in the graveyard
• Devoted Druid in the graveyard
• Necrotic Ooze does not have summoning sickness

Steps

1. Activate Necrotic Ooze using Garth One-Eye's ability by tapping it, causing you to pay to cast a copy of Black Lotus
2. Activate Black Lotus by tapping and sacrificing it, adding
3. Activate Necrotic Ooze using Devoted Druid's second ability by putting a -1/-1 counter on it, untapping it
4. Activate Necrotic Ooze using Garth One-Eye's ability by tapping it, causing you to pay to cast a copy of Regrowth
5. Resolve Regrowth, returning Garth One-Eye to your hand from your graveyard
6. Activate Necrotic Ooze using Krosan Archer's ability by paying and discarding Garth One-Eye, giving Necrotic Ooze +0/+2 until end of turn
7. Activate Necrotic Ooze using Devoted Druid's second ability by putting a -1/-1 counter on it, untapping it
8. Repeat

Results

• Infinite magecraft triggers
• Infinite self-discard triggers
• Infinite storm count