Adele's True Nobility vs Lucid Dragon
nobility + aether guard
nobility grants a shield 80% of the damage you took to your hp (exlcuding hp shield)
lucid dragon is 4 ticks of 100% hp damage
Guard first tick for iframe + additional damage reduction (From 40% to 55%).
Each tick is only 45% hp now and it's enough to tank the remaining 3 ticks with the hp shield you get.
You can tank without timing aether guard nullifying the first tick, but you would need to heal back to full hp after the 1st or 2nd tick.
But in all honesty, just float and/or blink :)