Homicidal Seclusion 

Enchantment
$0.06 #25937 0.57 14.3 years
As long as you control exactly one creature, that creature gets +3/+1 and has lifelink.
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Cards similar to Homicidal Seclusion expected a card that isn't here?
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Deadly Wanderings92%
$0.18↑#267630.00↓11.4 years↓
"As long as you control exactly one creature, that creature gets +2/+0 and has deathtouch and lifelink."
Scourge of the Undercity80%
$0.23↑#18463↑0.22↓1.8 years↓
"When this creature enters, another target creature you control gains lifelink until end of turn."
Rosa, Resolute White Mage78%
$3.00↑#6146↑0.19↓1.2 years↓
"At the beginning of combat on your turn, put a +1/+1 counter on target creature you control. It gains lifelink until end of turn."
Alabaster Mage78%
$0.17↑#20745↑0.5715.1 years
"
: Target creature you control gains lifelink until end of turn."
Nearheath Pilgrim76%
$0.06#231720.27↓14.3 years
"As long as this creature is paired with another creature, both creatures have lifelink."
Sanguine Savior74%
$0.12↑#217250.572.6 years↓
"When this creature is turned face up, another target creature you control gains lifelink until end of turn."
Mortal's Ardor74%
$0.17↑#20296↑0.07↓12.6 years↓
"Target creature gets +1/+1 and gains lifelink until end of turn."
Mark of the Vampire74%
$0.12↑#15448↑0.00↓14.1 years
"Enchanted creature gets +2/+2 and has lifelink."
Grotesque Mutation74%
$0.15↑#18881↑0.44↓10.4 years↓
"Target creature gets +3/+1 and gains lifelink until end of turn."
Noble Banneret72%
$0.06#31996↓0.00↓10.0 years↓
"As long as you control one or more creatures with a name you noted for cards named this card, this creature and those creatures get +1/+1 and have lifelink."
Abzan Battle Priest72%
$0.22↑#3663↑0.10↓11.9 years↓
"Each creature you control with a +1/+1 counter on it has lifelink."
Moment of Heroism72%
$0.04↓#18392↑0.4714.9 years
"Target creature gets +2/+2 and gains lifelink until end of turn."
Give In to Violence72%
$0.10↑#13774↑0.15↓1.9 years↓
"Target creature gets +2/+2 and gains lifelink until end of turn."