A rough guideline might be a 40-card deck with 20 Monsters, 10-12 Spells, and 8-10 Traps, but remember, this ratio is flexible and should be adapted based on your deck's needs
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As a result, rather than flashing back a Dread Return and triggering Bridge from Below, the new Dredgevine build attempted to fill the graveyard with Vengevines, cast a couple of Gravecrawlers or Skaab Ruinators in the same turn, and then return a bunch of hasty Vengevines to the battlefield and hopefully kill the opponent with a big hit of surprise damage
So, you cannot turn on cards from the side deck
and features new variants of previous cards, of which this is one
Its Ability, Battle Song, says, As long as this Pokmon is in play, your Dragon-type Pokmons attacks do an additional 20 damage to any active Pokmon. I think everyone has had ideas in the past for decks based on Aerodactyl adding damage to some Pokmons attacks that never really panned out because of how difficult Aerodactyl is to get into play