hey here is some ideas with infect. most Creatures with infect are black "there are not many red infect Creatures" so here are some ideas
"Hand of the Praetors", gives all infect Creatures +1/+1 and when ever you cast a Creature with infect target player get a poison counter.
if you like infect "overrun" might help its a sorcery gives all your Creatures
+3/+3 and trample to give your oppent more poison counters
also you might like Contagion Engine/Contagion clasp they have Proliferate which gives any thing that has a counter another of the same type, Poison, +1/+1, -1/-1, loyatly(planeswalker), charge counter.....
Ichor Rats" might help when you cast hime every one gets a poison counter so then you can "proliferate" and keep adding they to your oppents
Skinrender" infect and when you cast him target creature gets -3/-3
Geth, Lord of the Vault" he isn't infect but a really nasty card you pay X{B} to cast a creature from a graveyard where X is the converted mana cost (my buddy had this and keep getting my kokusho and hitting me for 5 or I could kill it lose 5 life and he gains 5 life, then he would do it agian
I hhope these help
Just a little constructive criticism. First off, if you're making infect you would want to go green/black as green has access to much better infect creatures. Also, Skinrender does not have infect. If he is playing infect Geth is a bad choice. He does not fit the flavor or theme of the deck.
One deck that is casual yet can be a real beating is mono-white infect. It runs all of the artifact infect creatures from Scars minus Vector Asp and uses Tempered Steel to give them all +2/+2. There are new artifact creatures in Besieged as well which would be viable.
I just feel like those answers are wrong...Sacrificing the Tectonic Edge is part of the activation cost so therefore it can not be a legal target. Much like when casting "Fling" and someone counters it. You still lose the creature because sacrificing the creature is part of the cost.
EDIT: Ignore me, I'm an idiot. I wasn't paying attention at all. Targets are declared first then the cost...duh.
http://i.imgur.com/BOZme4K.jpg
Just a little constructive criticism. First off, if you're making infect you would want to go green/black as green has access to much better infect creatures. Also, Skinrender does not have infect. If he is playing infect Geth is a bad choice. He does not fit the flavor or theme of the deck.
One deck that is casual yet can be a real beating is mono-white infect. It runs all of the artifact infect creatures from Scars minus Vector Asp and uses Tempered Steel to give them all +2/+2. There are new artifact creatures in Besieged as well which would be viable.
EDIT: Ignore me, I'm an idiot. I wasn't paying attention at all. Targets are declared first then the cost...duh.