Crackdown Construct + Arm-Mounted Anchor

Crackdown Construct

Arm-Mounted Anchor

How it works

1. Activate Arm-Mounted Armor's equip ability by paying 0, targeting Crackdown Construct.
2. Crackdown Construct triggers, giving itself +1/+1 until end of turn.
3. Resolve the Arm-Mounted Armor ability, attaching it to Crackdown Construct.
4. Repeat.

This clever loop centers on the equip ability of Arm-Mounted Anchor, which normally costs two mana but drops to zero when you have one or fewer cards in hand. By repeatedly targeting Crackdown Construct with this zero-cost activation, you bypass the usual mana bottleneck entirely. Each time you declare the activation, Crackdown Construct triggers to reward your mechanical tinkering with a permanent power boost, growing larger and larger with every iteration until it towers over the battlefield as an infinitely large creature until end of turn.