Which Keyword Abilities "Stack"?

So armadillo cloak is stackable but lifelink is not. Correct?

So armadillo cloak is stackable but lifelink is not. Correct?

You gots it.

So if I have a greenweaver Druid and a level 5 joraga tree speaker in play together, does the Druid now tap for 4 G?

Nope. It'll have two versions of the same ability: ": add to your mana pool."

Weird question, but I think it still kind of fits into the "stacking abilities" question:  if I have two corpsejack menace out on the field and I scavange a deadbridge Goliath, does one of my corpsejack menace get +20 +20?

Weird question, but I think it still kind of fits into the "stacking abilities" question:  if I have two corpsejack menace out on the field and I scavange a deadbridge Goliath, does one of my corpsejack menace get +20 +20?

Yup. Now activate that rogue's passage and swing!

Does Pyreheart Wolf's ability stack? And on the same note does  Madcap Skills

Does Pyreheart Wolf's ability stack? And on the same note does  Madcap Skills

The +3/+0 on madcap will stack. However the blockers clauses on both of those cards would be a redundancy - no matter how many copies of "this creature can only be blocked by two or more creatures" you put on your attacker, it will say "this creature can only be blocked by two or more creatures."