Eldrazi Displacer's ability must resolve completely before anyone can do anything. You can't do anything to the exiled card in the middle of the resolving ability.
Author: bimmerbot
How to determine Fall of the Titans’ Converted Mana Cost with Surge
If you Surge Fall of the Titans for X=2, it's a legal target for Disdainful Stroke.
What your “second spell” means to Jori En or Pyromancer’s Assault
Jori En and Pyromancer's Assault trigger only on the 2nd spell. Not the 4th or 6th…
How multiple Sylvan Advocates interact.
Each Sylvan Advocate only pumps itself (not other Sylvan Advocates) and your land creatures.
Removing Embodiment of Insight after attackers are declared.
If Embodiment of Insight and a land creature attack, and the Embodiment is removed, the land creature is still untapped and attacking.
How best to kill a Wandering Fumarole with burn spells.
If you're going to try to kill Wandering Fumarole with a burn spell that does 1-3 damage, your best bet is to do it in response to them turning it into a 4/1.
Vryn Wingmare can improve your converge spells
You can pay extra mana for a spell like Radiant Flames only if an external effect is imposing an additional cost to cast it. That's a handy interaction with Vryn Wingmare and the like!
Zada and Tandem Tactics
Tandem Tactics can only trigger Zada if you choose Zada as the single target for it, and the copies will each have a single target as well.
Hangarback Walker and Hardened Scales
Hangarback Walker plays well with Hardened Scales... but casting Walker for 0 isn't going to work out well for you.