Dr Entropy
The art of mimicry has no limits
I draw one card. I play a Mountain. I tap both to play Heart Sliver. I attack with Heart Sliver.
Hand: 6
In Play: Island(T), Mountain(T), Heart Sliver(T)
Graveyard: None
(Mountain. CC: 0. Tap to add one R.)
(Heart Sliver. CC: 1R. Slivers have Haste. 1/1)
((Haste. Creatures with Haste do not suffer from summoning sickness.))
If that is your plan, then you are a fool.
I draw one card. I play Forest. I tap Forest and Mountain for Gemhide Sliver. I tap Gemhide Sliver, Heart Sliver and Island for Winged Sliver and Screeching Sliver. Winged Sliver and Screeching Sliver attack, for another two points of damage.
Life: 19
Hand: 2
In Play: Forest, Island, Mountain. Gemhide Sliver, Heart Sliver, Winged Sliver, Screeching Sliver.
Graveyard: None
I end my turn.
(Forest: CC. 0. Tap to provide one G.)
(Gemhide Sliver. CC: 1G. All Slivers gain Tap: Provide one mana of any color. 1/1)
(Winged Sliver. CC: 1U. All Slivers gain Flying. 1/1)
(Screeching Sliver. CC: U. All Slivers have: Tap- Target player puts the top card of his or her library into their graveyard. 1/1)
((Flying: Creatures with Flying may not be blocked by creatures who do not have Flying.))