High Tide

Until end of turn, whenever a player taps an Island for mana, that player adds an additional {U}.

Brainstorm

Draw three cards, then put two cards from your hand on top of your library in any order.

Return target nonland permanent and all other permanents with the same name as that permanent to their owners' hands.

Look at the top three cards of your library, then put them back in any order. You may shuffle.
Draw a card.

Search your library for a blue instant card, reveal that card, put it into your hand, then shuffle.

Draw three cards.
Islandcycling {1} ({1}, Discard this card: Search your library for an Island card, reveal it, put it into your hand, then shuffle.)