How can a creature with the extraplanar subtype avoid being sent forcibly back to its native plane?

Question

Theory here but this will be a Changeling with the extraplanar subtype from the Dark Template. The character is currently martial rogue and has huge dumps into skills for infiltration and subterfuge. Ideally I won't see combat but even without that I want ways to handle the inevitable the DM will be throwing at me. (Banishment and Dismissal)

I am unsure of ways to avoid those two things from happening to me as the concept of extraplanar is new to me entirely.

Also in the worst case of being sent back to my home plane what are some things I could get/obtain to get back to the material plane?

We have a no holds bar on source material anything labeled 3.5 works and next to nothing is unused in some way.

Answer 1

Dimensional Anchor (spell): "Any creature or object struck by the ray is covered with a shimmering emerald field that completely blocks extradimensional travel."

It doesn't list those forced movements in the examples, but in the examples it said, "including" meaning it's not limited to those examples (which were really just spells that weren't explicitly extra-dimensional, save for gate, I believe). It makes sense - just as sailors use physical anchors to prevent unwanted sea travel, so too can an extra dimensional being use a dimensional anchor to prevent unwanted dimensional travel.

You would have to see the banishments coming. Of course, you could get some type of auto-casting equipment...ring of counter spells? Countering the spell could work, but not quite what I meant...I can't think of anything else that would cast Dimensional Anchor on yourself, in response to being targeted by banishments. Perhaps you could finagle a custom magic item that is continuous to cast it on you when targeted? Ask your GM.

Of course an even more general way to defend against it is to have a really high will save. Many magic items do this on the relatively cheap. Barbarians can also rage, gaining will save. For a one level dip, and the feat to turn raging into an immediate action (allowing you to interrupt an action to rage, gaining the bonuses before it strikes), you would have a bit more protection. Of course, this protection is equivalent to Iron Will...but there are side benefits to the immediate rage other than the will bonus.

Answer 2

While Dimensional Anchor, either as a well timed scroll or an always-on custom magic item, works it has the downside of preventing beneficial forms of magical movement.

An alternate option is to enchant two always equipped weapons (armor/shield spikes, spiked gauntlets, etc) with the Spellblade weapon enchantment (Player's Guide to Faerun page 120), designating them to Dismissal and Banishment respectively.

Spellblade: The wielder of a spellblade weapon is immune to a single spell chosen at the time the weapon is created. The selected spell must be one that is targeted against the wielder, not one that affects an area or creates an effect. When the wielder is next subjected to the chosen spell, the weapon absorbs it. On his next turn, he can opt to either let the spell drain harmlessly away or direct it at a new target as a free action. Strong abjuration; CL 13th; Craft Magic Arms and Armor, spell turning; Price 6,000 gp.

Answer 3

Dismissal is negated by a Will save, so either have a good Will save or do not antagonise people with access to either that spell or the superior Banishment. Or invest in anti-caster measures.

As for getting back, Gate is a good way but requires 9th level casting. For lower levels, Plane Shift will do the trick (Cleric 5/Wizard 7) but it's less accurate since you appear 5d% (5 to 500) miles off from your destination. Though RAW suggest that going TO the Material rather than FROM it works differently.