Hydra Typhoon

{u}{t}: Sacrifice a creature, then create a blue
hydra creature token with power and toughness
equal to half the number of islands you control rounded up.
When this card enters the battlefield choose one:
•Hydra creatures you control have reach.
•Creatures you control have "{t}, Deal 1
damage to any target.".
A mysterious old sailor once warned of a storm of
serpent larger than the great kraken whales.