Undercity Reaches

Whenever a creature deals combat damage to a player, its controller may draw a card.
Whenever chaos ensues, you have no maximum hand size for the rest of the game.

Whenever a creature deals combat damage to a player, its controller may draw a card.
Whenever you roll chaos, you have no maximum hand size for the rest of the game.

March of the Machine Commander

Planechase Anthology Planes

Whenever a creature deals combat damage to a player, its controller may draw a card.
Whenever you roll CHAOS, you have no maximum hand size for the rest of the game.