Glazed Fiend Combo
Leonin Relic-Warder+Phyrexian Metamorph goes infinite for artifact ETB triggers constantly exiling itself and un-exiling itself by targeting Leonin.
With Glaze Fiend, who will get infinitely pumped by these Artifact ETB triggers to Infinite/Infinite
Ideal Start
T1 [Land]
Sleight of Hand
for Combo piece
T2 Land Into
Glaze Fiend
T3 land Leonin Relic-Warder with one mana for counter protection or
Sleight of Hand
T4 Land Play Phyrexian Metamorph Targeting the Leonin Relic-Warder creating infinite ETB's
[pay 2 life with Metamorph to hold up Spell Pierce ]
Swing for Infinite with
Glaze Fiend
Of course the above is ideal but unlikely considering your opponent will likely have interaction of some type but in some linear strategies this could happen.
A few of the other cards
Glassdust Hulk
- Also goes infinite but cost a bit more and can be clunky but un-blockable help guarantee the kill if your opponents tapped out.
Spellskite Helps us combo in matchups where removal is present main deck-able for this reason
Lotus Bloom
- Lets us do stuff our turn we opt to combo also lets us combo with hulk earlier.
Soul Warden nets us infinite life with the ETB triggers.
I guess you could also infinite life combo with soul sisters but that is nowhere near as fun as killing your opponent with glaze fiend
This is budgetadd Serum Visionsadd better land base for competitive viability