Jar of Eyeballs [Commander 2013] Vampire Assassin You can only use this

You can only use this effect of "Giant Rex" once per turn

You can Tribute 1 Reptile-Type "Worm" monster to select and destroy 1 card your opponent controls

they get +1/+1 until end of turn

also you cannot Special Summon monsters for the rest of this turn

Set: Ravnica: City of Guilds Type: Instant Rarity: Uncommon Cost: {1}{U}{U}{B} Return target permanent to its owner's hand

Jar of Eyeballs [Commander 2013] Vampire Assassin You can only use thisSet: Commander 2013 Type: Artifact Rarity: Rare Cost: {3} Whenever a creature you control dies, put two eyeball counters on Jar of Eyeballs. {3}, {T}, Remove all eyeball counters from Jar of Eyeballs: Look at the top X cards of your library, where X is the number of eyeball counters removed this way. Put one of them into your hand and the rest on the bottom of your library in any order.