Obelisk of Alara

When this creature enters, create four 1/1 colorless Myr artifact creature tokens.

Whenever this creature attacks, you may tap X untapped Myr you control. If you do, this creature gets +X/+0 until end of turn and deals X damage to the player or planeswalker it's attacking.

When this artifact enters, it deals 5 damage to target creature.

, Discard this card: Destroy target artifact.

When this artifact enters, sign it and shuffle it into target player's library. That player reveals each card they draw until they draw this card. When that player draws this card, it deals 19½ damage to them.

Defender (This creature can't attack.)

: This creature gets +1/+0 until end of turn.

: This creature gets +0/+1 until end of turn.

: This creature deals 1 damage to target creature without flying that's attacking you.

At the beginning of your upkeep, draw a card.

: This artifact deals 1 damage to any target.

Untap this creature during each other player's untap step.

: This creature deals 1 damage to any target.

, : Target creature can't attack or block this turn.

, : Draw a card.