Xien's Intervention

When you cast this spell, you may pay 2 life.
Target creature you control gains +2/+0 and Menace till the end of turn.
If life was payed, that creature also gains "Whenever this creature it's blocked, it gains Trample."
"A berserker came from nowhere, and with the help of some members of its clan, she crashed a cultist skull in the middle of the battle."