Omen of Fire

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

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

Choke

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

Tsunami

Typhoon

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