Edison Format · March 2010
If your opponent controls 0 Plants, "Rose Tentacles" could attack twice. If your opponent controls 1 Plant, "Rose Tentacles" could attack twice.
The number of attacks that "Rose Tentacles" can perform is determined at the start of the Battle Phase.
If the number of Plants changes, the number of attacks "Rose Tentacles" can perform doesn’t change.
The restriction against Special Summoning "Rose Tentacles" is not an 'effect'.
The effect of "Rose Tentacles" to inflict damage happens at the end of the Damage Step.
You can combine the effect of "Rose Tentacles" with "Wonder Clover".
If your opponent controls 0 Plants, "Rose Tentacles" could attack twice.
If your opponent controls 1 Plant, "Rose Tentacles" could attack twice.
If your opponent controls 2 Plants, "Rose Tentacles" could attack 3 times.
If "Rose Tentacles" gains extra attacks at the start of your Battle Phase, but is then flipped face-down or temporarily leaves the field before it attacks, it can only attack once during that Battle Phase after it returns or is flipped face-up again.
The number of attacks that "Rose Tentacles" can perform is determined at the start of the Battle Phase. If the number of Plants changes, the number of attacks "Rose Tentacles" can perform doesn't change.