Typhoon

Typhoon deals damage to each opponent equal to the number of Islands that player controls.

Carpet of Flowers

At the beginning of each of your main phases, if you haven't added mana with this ability this turn, you may add X mana of any one color, where X is the number of Islands target opponent controls.

Boil

Boiling Seas

Tsunami

Omen of Fire

Return all Islands to their owners' hands. Each player sacrifices a Plains or a white permanent for each white permanent they control.

Choke

Islands don't untap during their controllers' untap steps.