Eidolon of Astral Winds 
Enchantment Creature — Spirit
$0.31 #15330 0.19 1.8 years
Vigilance
Constellation — Whenever this creature or another enchantment you control enters, choose target creature you control. Until end of turn, that creature has base power and toughness 4/4 and gains flying.
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Oakheart Dryads85%
$0.09↓#23958↓0.2012.3 years↑
"Whenever this creature or another enchantment you control enters, target creature gets +1/+1 until end of turn."
Eutropia the Twice-Favored84%
$0.15↓#133920.256.6 years↑
"Whenever an enchantment you control enters, put a +1/+1 counter on target creature. That creature gains flying until end of turn."
Pious Wayfarer84%
$0.18↓#23856↓0.136.6 years↑
"Whenever an enchantment you control enters, target creature gets +1/+1 until end of turn."
Setessan Skirmisher82%
$0.08↓#28021↓0.00↓6.6 years↑
"Whenever an enchantment you control enters, this creature gets +1/+1 until end of turn."
Oath of the Ancient Wood78%
$0.23↓#19682↓0.07↓13.1 years↑
"Whenever this enchantment or another enchantment you control enters, you may put a +1/+1 counter on target creature."
Flexible Waterbender78%
$0.17↓#146350.00↓0.8 years↓
"Vigilance"
Triton Waverider78%
$0.06↓#28867↓0.33↑6.6 years↑
"Whenever an enchantment you control enters, this creature gains flying until end of turn."
Nexus Wardens76%
$0.19↓#169020.47↑6.6 years↑
"Whenever an enchantment you control enters, you gain 2 life."
Humbler of Mortals76%
$0.16↓#19357↓0.2912.3 years↑
"Whenever this creature or another enchantment you control enters, creatures you control gain trample until end of turn."
Dreadbringer Lampads76%
$0.07↓#22337↓0.39↑12.3 years↑
"Whenever this creature or another enchantment you control enters, target creature gains intimidate until end of turn."
Whitewater Naiads76%
$0.28↓#169290.50↑12.3 years↑
"Whenever this creature or another enchantment you control enters, target creature can't be blocked this turn."
Katara, Water Tribe's Hope76%
$0.77↑#4666↑0.00↓0.8 years↓
"Vigilance"
Nylea's Colossus75%
$5.07↑#7219↑0.82↑8.1 years↑
"Whenever this creature or another enchantment you control enters, double target creature's power and toughness until end of turn."
Daxos's Torment74%
$0.36↑#23108↓0.1210.8 years↑
"Whenever this enchantment or another enchantment you control enters, this enchantment becomes a 5/5 Demon creature with flying and haste in addition to its other types until end of turn."
Protean Thaumaturge73%
$0.35↑#10264↑0.38↑6.6 years↑
"Whenever an enchantment you control enters, you may have this creature become a copy of another target creature, except it has this ability."
Strength from the Fallen72%
$0.20↓#24118↓0.1112.3 years↑
"Whenever this enchantment or another enchantment you control enters, target creature gets +X/+X until end of turn, where X is the number of creature cards in your graveyard."
Rimefur Reindeer72%
$0.14↓#19722↓0.80↑3.0 years↑
"Whenever an enchantment you control enters, tap target creature an opponent controls."
Captivating Unicorn72%
$0.17↓#181100.256.6 years↑
"Whenever an enchantment you control enters, tap target creature an opponent controls."
Erratic Apparition71%
$0.12↓#21733↓0.07↓1.9 years
"Whenever an enchantment you control enters and whenever you fully unlock a Room, this creature gets +1/+1 until end of turn."
Harvestguard Alseids71%
$0.12↓#174800.1212.3 years↑
"Whenever this creature or another enchantment you control enters, prevent all damage that would be dealt to target creature this turn."