Illusionist's Gambit [Commander 2013] SPA Regalo de Tassa Search your library for a

Search your library for a number of Plains cards equal to the difference and reveal them

When Blossoming Sands enters the battlefield

Set: Zendikar Type: Creature — Merfolk Wizard Ally Uncommon Cost: {4}{U} Whenever Seascape Aerialist or another Ally enters the battlefield under your control

Why not ask the winds

Illusionist's Gambit [Commander 2013] SPA Regalo de Tassa Search your library for aSet: Commander 2013 Type: Instant Rare Cost: {2}{U}{U} Cast this spell only during the declare blockers step on an opponent's turn. Remove all attacking creatures from combat and untap them. After this phase, there is an additional combat phase. Each of those creatures attacks that combat if able. They can't attack you or a planeswalker you control that combat.