Necromantic Summons [mana]4B[/mana]
Sorcery
Uncommon
Put target creature card from a graveyard onto the battlefield under your control.
Spell mastery — If there are two or more instant and/or sorcery cards in your graveyard, that creature enters the battlefield with two additional +1/+1 counters on it.
Source: https://twitter.com/shawnmain/status/615931569463660544