Flying

When Hoarding Dragon enters the battlefield, you may search your library for an artifact card, exile it, then shuffle your library.

When Hoarding Dragon dies, you may put the exiled card into its owners hand.

Whenever you activate an ability of an artifact, if it isnt a mana ability, you may pay R. If you do, copy that ability. You may choose new targets for the copy.

Flying

R: Shivan Dragon gets +1/+0 until end of turn.

Flying

When Siege Dragon enters the battlefield, destroy all Walls your opponents control.

Whenever Siege Dragon attacks, if defending player controls no Walls, it deals 2 damage to each creature without flying that player controls.

Equipped creature gets +2/+0 and has vigilance and At the beginning of your upkeep, draw a card.

When equipped creature dies, target opponent gains control of Avarice Amulet.

Equip 2 (2: Attach to target creature you control. Equip only as a sorcery.)

TAP: Put a charge counter on Grindclock.

TAP: Target player puts the top X cards of his or her library into his or her graveyard, where X is the number of charge counters on Grindclock.

Equipped creature gets +4/+4.

0: Until end of turn, Haunted Plate Mail becomes a 4/4 Spirit artifact creature thats no longer an Equipment. Activate this ability only if you control no creatures.

Equip 4 (4: Attach to target creature you control. Equip only as a sorcery.)

Convoke (Your creatures can help cast this spell. Each creature you tap while casting this spell pays for 1 or one mana of that creatures color.)

As Obelisk of Urd enters the battlefield, choose a creature type.

Creatures you control of the chosen type get +2/+2.

As Phyrexian Revoker enters the battlefield, name a nonland card.

Activated abilities of sources with the chosen name cant be activated.

Scuttling Doom Engine cant be blocked by creatures with power 2 or less.

When Scuttling Doom Engine dies, it deals 6 damage to target opponent.