Mossborn Hydra + Agatha's Soul Cauldron + Fertilid + Crystalline Crawler

Prerequisites

• Mossborn Hydra has at least four +1/+1 counters on it.

Steps

1. 1Activate Mossborn Hydra using Fertilid's ability by paying and removing a +1/+1 counter from it, causing you to search your library for a basic land card and put it onto the battlefield tapped.
2. 2When the land enters the battlefield, Mossborn Hydra triggers, doubling the number of +1/+1 counters on it.
3. 3Activate Mossborn Hydra twice using Crystalline Crawler's first ability by removing two +1/+1 counters from it, adding .
4. 4Repeat until there are no basic lands in your library.

Effects

• Near-infinite +1/+1 counters on a creature
• Near-infinite colored mana
• Put all basic lands from your library onto the battlefield tapped