Dubious Challenge

+2: Chandra deals 2 damage to each opponent. −3: Chandra deals 4 damage to target creature. −10: Chandra deals 6 damage to target player or planeswalker and each creature that player or that planeswalker's controller controls.

Equipped creature gets +1/+2. Whenever an Artificer you control enters, you may attach this Equipment to it. Equip 2 (2: Attach to target creature you control. Equip only as a sorcery.)

Whenever this creature becomes tapped, each opponent loses 1 life and you gain 1 life.

When this artifact enters, create a 1/1 colorless Servo artifact creature token. 1W, Sacrifice this artifact: Create a 1/1 colorless Servo artifact creature token.

Target creature gets +2/+2 until end of turn. If it's an artifact creature, it gains indestructible until end of turn. (Damage and effects that say "destroy" don't destroy it.)

When this artifact enters, draw a card. 1, T: Add one mana of any color.

Flying Whenever this creature or another creature you control enters, you get E (an energy counter). Whenever this creature attacks, you may pay EE. If you do, put a +1/+1 counter on it and tap up to one target creature defending player controls.

Target creature gets +4/+4 and gains trample until end of turn.