Rykard, Lord of Blasphemy

Trample, Shardbearer (If this creature is your commander, you may take a Great Rune as a second commander)
Whenever you sacrifice a creature, Rykard gets +X/+0 until the end of turn, where X is the sacrificed creature's toughness
Whenever you sacrifice another creature with power 4 or less, you may shuffle it into your library instead of sending it anywhere else

Rykard's ambitions, though blasphemous, marked him a worthy sovereign