Easy song, if you follow.
Verse
G|----------------|
D|----------------|
A|---1-1---3-3-2--|
E|0-0----2--------|
First Chorus
G|---------------------------------|
D|---------------------------------|
A|3-3-3-3-3-3-----3-3-3-3-3-3------|
E|------------2-2-------------4-4--|
Second Chorus
G|--------|
D|--------|
A|3-3--3--|
E|--------|
Third Chorus
G|---------------------------------5--|
D|---------------------------3-4-5----|
A|3-3-3-3-3-3-3-----3-3-3--5----------|
E|--------------2-2-------------------|
Pre-Solo A
G|---------------------------------------------------|
D|---------------------------------------------------|
A|2-2-2-2-2-2--2-2-2--2-2-2-2--2-2-2--2-2-2-2--2-----|
E|------------------------------------------------2--|
Pre-Solo B
[ Tab from: https://www.guitartabs.cc/tabs/p/possessed/pentagram_btab.html ]
G|----------------------------------------------------|
D|----------------------------------------------------|
A|2-2-2-2-2-2--2-2-2--2-2-2-2--2-2-2--2-2-2-2--2-3----|
E|-------------------------------------------------4--|
Pre-Solo II
G|-------------------------------|---(A)-----|--(B)---|
D|-------------------------------|-----------|--------|
A|-------------------------------|---3-2-----|--------|
E|2--2-2--2--2-2--2--2-2--2--2-2-|-2-----5---|4/12\4--|
Solo
G|---(Repeat for a while)-----------|--(Repeat for a while as well)---|
D|----------------------------------|---------------------------------|
A|6-6-6-6-6-6-6-6--4-4-4-4-4-4-4-4--|-------6-4--6-4------------------|
E|----------------------------------|4-4-4----------------------------|
Those are pretty much all the riffs in the whole song. Enjoy.