Sphinx of Enlightenment
If discover allows you to cast a split card, you may cast either half (as long as its mana value is less than or equal to the effect's discover value) but not both halves
However, if a single creature you control with lifelink deals combat damage to multiple creatures, players, and/or planeswalkers at the same time (perhaps because it has trample or was blocked by more than one creature), the ability will trigger only once
And whether you're staring down your opponent's looming Limited Edition (Alpha) Disrupting Scepter or mulling over a well-timed Mind Rot today, coming out with the best answer you can is crucial
If an effect reduces an indestructible creatures toughness to 0 or less, its still put into its owners graveyard
The added scry 1 makes this pseudo-Lightning Bolt a star, and smoothing draws is vital to avoid drawing a redundant land card when attack-oriented creatures are needed