When an opponent's monster declares an attack: Send 1 "Crystal Beast" card from your Spell & Trap Card Zone to the Graveyard to target the attacking monster; negate the attack, then you can add 1 "Rainbow Dragon" or "Rainbow Dark Dragon" from your Deck to your hand.
At the start of the Battle Phase: For the rest of this turn after this card resolves, Spell/Trap Cards, and their effects, cannot be activated. Cards and effects cannot be activated in response to this card's activation.
Other Useful Cards
Alternative for Anti-Magic Arrows, to prevent or negate the activation of Rainbow Path and deal final attack successfully.
Against Conclave, If he plays a face up Conclave. Destroy it with Twister/Cyclone when you are at 1 card left. Then Set another Cyclone an end the turn. This will force him to play another Conclave/Path face down so you just destroy it with Cyclone and proceed with the combo on your turn.
If you use Ra Kiseitai deck be aware that if a Pegasus is face up on the field, Kiseitai's life gain effect may not activate. This is an already known bug on this event yet Komoney did not fix it. Probably because they wanted to screw farming
Ra-Kiseitai isn't work anymore coz Konameh limited Massivemorph. They even forgot farming LD. Too much focus on PvP duels by nerf this, nerf that. At least they give us some chances to farm LD consistently with those limited cards
I find it to be MORE than consistent enough (I run 3 Reloads though), especially against the three I mentioned since they're notoriously troublesome to farm otherwise.
This is what I've been toying with. The dream is to open with Sanctuary or Zeradias, one of the battle immune creatures and Divine Punishment. He can kill your creature or damage you by attacking it and you can counter his one Conclave. Score wise its mediocre... I've been getting about 6,800, there are 4 foil and 1 prismatic.
You forgot to mention something with all of these decks: in the 100% chance of your opponent starting the game with their Crystal Gathering (whoops I mean Crystal Conclave), every single one of these decks INSTANTLY FAIL.