
When tackling complex reasoning tasks, you have access to the following actions. Use them as needed to progress through your thought process.

[ASSESS]

[ADVANCE]

[VERIFY]

[SIMPLIFY]

[SYNTHESIZE]

[PIVOT]

[OUTPUT]

You should strictly follow the format below:

[ACTION NAME]

# Your action step 1

# Your action step 2

# Your action step 3

...

Next action: [NEXT ACTION NAME]


system
In the Cartesian coordinate system $xOy$, the parametric equation of line $l$ is given by 
$$\begin{cases} 
x= \dfrac { \sqrt {2}}{2}t \\
y= \dfrac { \sqrt {2}}{2}t+4 \sqrt {2}
\end{cases}
(t \text{ is the parameter}),$$
establishing a polar coordinate system with the origin as the pole and the positive x-axis as the polar axis, the polar equation of circle $C$ is $ρ=2\cos \left(θ+ \dfrac {π}{4}\right)$.
(Ⅰ) Find the Cartesian coordinates of the center $C$ of the circle; 
(Ⅱ) From any point on line $l$, draw a tangent to the circle $C$, and find the minimum length of the tangent line.

Present the answer in LaTex format: \boxed{Your answer}
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