Contract Killing

As long as this creature is attacking, it gets +2/+0. Pay 4 life: This creature gains indestructible until end of turn. (Damage and effects that say "destroy" don't destroy it.)

Players can't cast spells from graveyards or activate abilities of cards in graveyards. Whenever a creature dies, you gain 1 life.

At the beginning of your upkeep, you may have two target players exchange life totals.

Enrage — Whenever this creature is dealt damage, put a +1/+1 counter on each other creature you control.

Vigilance Whenever this creature attacks, you may return target creature card with mana value 3 or less from your graveyard to the battlefield.

Lifelink (Damage dealt by this creature also causes you to gain that much life.)

Destroy target attacking creature. Draw a card.

Destroy target enchantment.