(2014, June 21) Dry With Sponge Entity

/scoreboard objectives add Sponge dummy

/scoreboard players set @e[type=Item] Sponge 0 {Age:0s,Item:{id:minecraft:sponge,Damage:0s}}

/execute @e[score_Sponge=0,score_Sponge_min=0] ~ ~ ~ /testforblock ~ ~ ~ water
[COMPARATOR]
\/
/execute @e[score_Sponge=0,score_Sponge_min=0] ~-2 ~-2 ~-2 /fill ~ ~ ~ ~4 ~4 ~4 air 0 replace water
=
/execute @e[score_Sponge=0,score_Sponge_min=0] ~ ~ ~ /scoreboard players set @e[score_Sponge=0,score_Sponge_min=0,r=1] Sponge 1
=
[REPEATER]
/scoreboard players reset * Sponge

/execute @e[score_Sponge=1,score_Sponge_min=1] ~ ~ ~ /summon Item ~ ~ ~ {Item:{id:minecraft:sponge,Damage:1,Count:1}}

/kill @e[score_Sponge=1,score_Sponge_min=1]