Rainmaker shield

The Rainmaker shield or Rainmaker barrier is a protective bubble surrounding the Rainmaker. Players must attack the shield in order to pop it and reach the Rainmaker weapon. As the player attacks it, the Rainmaker Shield grows in size and changes to the player's ink color. Attacking a shield enlarged by enemy ink will shrink it back towards it neutral state; thus, if opposing players are dealing equal damage to the shield, no progress will be made. After enough damage is dealt to the shield by one team, it explodes and releases a blast of ink that is lethal to any member of the opposing team who is standing too close.

If a player carrying the Rainmaker falls out-of-bounds or into water, or if the Rainmaker is left untouched for too long after the shield is broken, the Rainmaker shield will always respawn in its original state in the center of the map.

Breaking the shield
The Rainmaker shield has 1000 HP, but many weapon types have a damage multiplier applied when they hit the shield. The multiplier values are detailed in the tables below.

Roller-type weapons such as the Splat Roller or the Inkbrush cannot deal any damage to the shield by rolling towards it, so their ink-flicking attack must be used.

Sub weapons will instantly detonate on contact with the shield. However, throwing the Splash Wall will not detonate and the will disintegrate, so the rainmaker shield cannot be damaged by using the Splash Wall. Even if it's tossed where one side of ink rains on the shield, the shield cannot be harmed by the Splash Wall.

Splatoon
The damage multipliers each weapon has against the Rainmaker shield are detailed below.

With Damage Up
Unlike against Inklings, weapons do not have a damage cap when hitting the Rainmaker shield with Damage Up buffs. This means that Damage Up can be used to pop the shield faster than normal. The time gains for each weapon can be seen in the charts below.

Splatoon 2
The Object Shredder ability increases damage output against the Rainmaker shield by 10%. The damage multipliers each weapon has against the Rainmaker shield are detailed below.

Touching the shield
Touching the shield repeatedly will result to harming the Inkling. Being caught between the shield and a wall as the shield expands will instantly splat an Inkling.

Trivia

 * The Rainmaker shield behaves as a shield in Octo Valley which carries the Zapfish, but the shield doesn't respawn nor carries a Zapfish.
 * The shield only respawns with the current Inkling falls into water or out-of-bounds or gets splatted by an opposing Inkling, then the shield will respawn.