Once per turn, if a monster this card points to is flipped face-up: Add 1 Flip monster from your Deck or GY to your hand
The White Forest cards also expand into the wider Diabell strategy, including the new Diabellstar the Sin Adjudicator, which, alongside Elzette, is a 1.5-card Snake-Eyes Execute Dragon on the opponents turn, given you have the requisite Spell/Traps
This means if they can simply start this combo up, it will keep fueling itself with each subsequent attack
Add 1 Level 10 Pyro, Thunder or Fiend monster that cannot be Normal Summoned from your Deck to your hand
You get to pick two opponents if the game is coming close and could be won via burn, and it's harder to remove, at the cost of an extra mana
Both of these were extremely popular in casual circles and tournaments alike