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.
yes there is only 1 like the spiders lair
they are the same the more moder cards are spell cards and the older cards are magic cards they are both useable
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 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.
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.
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.