Crackdown Construct + Belt of Giant Strength

Crackdown Construct

Belt of Giant Strength

How it works

1. Activate Belt of Giant Strength's equip ability by paying 0, targeting the creature it is currently attached to.
2. Crackdown Construct triggers, giving itself +1/+1 until end of turn.
3. Resolve the Belt of Giant Strength ability, doing nothing.
4. Repeat.

This clever loop hinges on the elegant interaction between Crackdown Construct and Belt of Giant Strength. Because the Belt's equip ability reduces its cost by the target creature's power, once a 10/10 creature is equipped—which the Belt itself provides—re-targeting that same creature reduces the equip cost of {10} all the way down to {0}. Since targeting a creature with an ability you control counts as activating it, Crackdown Construct triggers every time you announce the free equip ability, feeding upon the endless repetition to grow infinitely large until end of turn.