Alex Wilder, Runaway 

Legendary Creature — Human Hero Villain
Whenever Alex Wilder or another creature you control enters, if you cast it from anywhere other than your hand, it gets +2/+0 and gains haste until end of turn.
Escape—{2}{R}, Exile three other cards from your graveyard. (You may cast this card from your graveyard for its escape cost.)
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Underworld Rage-Hound 100%
$0.16#22448
"Escape—{3}{R}, Exile three other cards from your graveyard."
Escape Velocity 98%
$0.25#17046
"Escape—{1}{R}, Exile two other cards from your graveyard."
+1 more matching line
Bloodbraid Challenger 84%
$0.73#6529
"Escape—{3}{R}{G}, Exile three other cards from your graveyard."
In the Web of War 82%
$0.87#18421
"Whenever a creature you control enters, it gets +2/+0 and gains haste until end of turn."
Fanatic of Xenagos 81%
$0.04#25673
"When this creature enters, if tribute wasn't paid, it gets +1/+1 and gains haste until end of turn."