Soulflayer 
Creature — Demon
$0.28 #20563 0.11 11.6 years
Delve (Each card you exile from your graveyard while casting this spell pays for 
.)
.)If a creature card with flying was exiled with this creature's delve ability, this creature has flying. The same is true for first strike, double strike, deathtouch, haste, hexproof, indestructible, lifelink, reach, trample, and vigilance.
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Cards similar to Soulflayer expected a card that isn't here?
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Urborg Scavengers96%
$0.28#12729↑0.203.3 years↓
"This creature has flying as long as a card exiled with it has flying. The same is true for first strike, double strike, deathtouch, haste, hexproof, indestructible, lifelink, menace, reach, trample, and vigilance."
Majestic Myriarch96%
$0.36↑#14687↑0.25↑9.1 years↓
"At the beginning of each combat, this creature gains flying until end of turn if you control a creature with flying. The same is true for first strike, double strike, deathtouch, haste, hexproof, indestructible, lifelink, menace, reach, trample, and vigilance."
Animus of Predation94%
$0.11↓#31867↓0.41↑10.0 years↓
"If you removed a creature card with flying from the draft with cards named this card, this creature has flying. The same is true for first strike, double strike, deathtouch, haste, hexproof, indestructible, lifelink, menace, reach, and vigilance."
Altar of the Wretched // Wretched Bonemass94%
$1.45↑#7498↑0.65↑2.8 years↓
"This creature has flying as long as an exiled card used to craft it has flying. The same is true for first strike, double strike, deathtouch, haste, hexproof, indestructible, lifelink, menace, protection, reach, trample, and vigilance."
Rayami, First of the Fallen92%
$0.27↓#215820.38↑7.0 years↓
"As long as an exiled creature card with a blood counter on it has flying, this card has flying. The same is true for first strike, double strike, deathtouch, haste, hexproof, indestructible, lifelink, menace, protection, reach, trample, and vigilance."
Indominus Rex, Alpha90%
$30.74↑#10227↑0.73↑2.8 years↓
"As this card enters, discard any number of creature cards. It enters with a flying counter on it if a card discarded this way has flying. The same is true for first strike, double strike, deathtouch, hexproof, haste, indestructible, lifelink, menace, reach, trample, and vigilance."
Thunderous Orator90%
$0.12↓#199050.00↓5.4 years↓
"Whenever this creature attacks, it gains flying until end of turn if you control a creature with flying. The same is true for first strike, double strike, deathtouch, indestructible, lifelink, menace, and trample."
Eater of Virtue88%
$0.35↑#9234↑0.054.5 years↓
"As long as a card exiled with this card has flying, equipped creature has flying. The same is true for first strike, double strike, deathtouch, haste, hexproof, indestructible, lifelink, menace, protection, reach, trample, and vigilance."
Odric, Blood-Cursed88%
$0.29↑#193880.00↓4.8 years↓
"When this card enters, create X Blood tokens, where X is the number of abilities from among flying, first strike, double strike, deathtouch, haste, hexproof, indestructible, lifelink, menace, reach, trample, and vigilance found among creatures you control."
Super-Adaptoid86%
$0.30↑#14852↑0.00↓0.2 years↓
"Whenever this card enters or attacks, choose another target creature. If that creature has haste and this card doesn't, put a haste counter on this card. Do the same for flying, first strike, double strike, deathtouch, indestructible, lifelink, menace, reach, trample, and vigilance."
Bleeding Effect85%
$0.30↑#9340↑0.38↑2.2 years↓
"At the beginning of combat on your turn, creatures you control gain flying until end of turn if a creature card in your graveyard has flying. The same is true for first strike, double strike, deathtouch, hexproof, indestructible, lifelink, menace, reach, trample, and vigilance."
Akroma, Vision of Ixidor84%
$10.75↑#5159↑0.205.8 years↓
"At the beginning of each combat, until end of turn, each other creature you control gets +1/+1 if it has flying, +1/+1 if it has first strike, and so on for double strike, deathtouch, haste, hexproof, indestructible, lifelink, menace, protection, reach, trample, vigilance, and partner."
Odric, Lunarch Marshal84%
$0.53↑#1492↑0.35↑10.4 years↓
"At the beginning of each combat, creatures you control gain first strike until end of turn if a creature you control has first strike. The same is true for flying, deathtouch, double strike, haste, hexproof, indestructible, lifelink, menace, reach, skulk, trample, and vigilance."
Cairn Wanderer82%
$0.35↑#11586↑0.32↑18.9 years↑
"As long as a creature card with flying is in a graveyard, this creature has flying. The same is true for fear, first strike, double strike, deathtouch, haste, landwalk, lifelink, protection, reach, trample, shroud, and vigilance."
Selective Adaptation82%
$0.31↑#170330.47↑6.4 years↓
"Reveal the top seven cards of your library. Choose from among them a card with flying, a card with first strike, and so on for double strike, deathtouch, haste, hexproof, indestructible, lifelink, menace, reach, trample, and vigilance. Put one of the chosen cards onto the battlefield, the other chosen cards into your hand, and the rest into your graveyard."
Kathril, Aspect Warper76%
$0.48↑#14728↑0.186.4 years↓
"When this card enters, put a flying counter on any creature you control if a creature card in your graveyard has flying. Repeat this process for first strike, double strike, deathtouch, hexproof, indestructible, lifelink, menace, reach, trample, and vigilance. Then put a +1/+1 counter on this card for each counter put on a creature this way."
Death-Mask Duplicant76%
$0.22↓#28569↓0.0922.6 years↑
"As long as a card exiled with this creature has flying, this creature has flying. The same is true for fear, first strike, double strike, haste, landwalk, protection, and trample."
Hooting Mandrills75%
$0.12↓#13842↑0.00↓11.9 years
"Delve Each card you exile from your graveyard while casting this spell pays for ."
."
Gurmag Angler75%
$0.23↓#218020.33↑11.6 years
"Delve Each card you exile from your graveyard while casting this spell pays for ."
."
Sultai Scavenger75%
$0.08↓#28842↓0.00↓11.9 years
"Delve Each card you exile from your graveyard while casting this spell pays for ."
."