Yes, Double Spell can be used to activate a Continuous Spell card.
'Shield and Sword', a Normal Spell Card, can do that.
Magic planter
Some good continuous spell cards to have are: Card Trader,Wave Motion Cannon,Ancient Gear Castle,Card Of Safe Return,etc.
No, there isn't. Unless you count a Field Spell Card, which is a spell card but has its own zone, so technically you can have 6 spells active.
they are the same the more moder cards are spell cards and the older cards are magic cards they are both useable
yes there is only 1 like the spiders lair
The best card in yugioh is the judegement dragon card.
No, it doesn't end the battle phase.
Yes, as long as the spell card is a Quickplay Spell, and the trap card is not a Counter Trap. So you cannot chain Monster Reborn to any trap. Nor can you chain Book of Moon to a Counter Trap, for example.
There's not a code for that in Yu-Gi-Oh, but there is a Continuous Spell card called "Card Shuffle", which allows you to shuffle your deck once per turn in exchange for 300 Life Points.
There are 10 S/T slots, so there can be a maximum of 10 continuous spell cards active, 5 on each side of the field. The Field Spell card is a special kind of continuous card, so technically that makes 11 in total if you count it.
You are only allowed 11 cards as a maximum on a field, you have five monster card slots, five spell/trap slots, and a Field Spell Card slot.