The Gitrog Monster, and The Necrobloom

Prerequisites

• The Gitrog Monster on the battlefield
• The Necrobloom on the battlefield
• You have a number of cards in hand that is above your maximum hand size, one of which must be a land card

Steps

1. Proceed to your cleanup step, and discard a land and any other card(s) as needed down to your maximum hand size
2. The Gitrog Monster triggers, causing you to mill two cards and return a land from your graveyard to your hand
3. Repeat, as you will still be over your maximum hand size and will be required to discard again

Results

• Infinite self-mill
• Near-infinite self-discard triggers